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Synthesis, crystal structure, magnetic properties and second harmonic generation of a new noncentrosymmetric coordination compound：Triaqua(4-amino-6-methoxypyrimidine) cuprate(Ⅱ)sulfate

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Chinese Chemical Letters 2016年第6期27卷 896-900页

作者： Mahjouba Ben Nasr kamel kaabi Matthias Zeller Wataru Fujita Pedro Sidónio Pereira da Silva Cherif Ben Nasr Laboratoire de Chimie des Materiaux Universite de Carthage Facultedes Sciences de Bizerte 7021 Zarzouna Tunisia Department of Chemistry Youngstown State University One University Plaza Youngstown OH 44555-3663 USA Graduate School of Natural Science Nagoya City University Yamanohata Mizuho-cho Mizuho-ku Nagoya 467-8501 Japan CFisUC Department of Physics University of Coimbra 3004-516 Coimbra Portugal

The chemical preparation, crystal structure and infrared spectroscopic characterization of the triaqua（4-amino-6-methoxypyrimidine） cuprate（II） sulfate, [Cu（C5H7N3）（H2O）3]SO4, is reported. The compound crystallizes in the noncentrosymmetric orthorhombic space group P212121 with lattice parameters a = 7.9025（3）, b = 11.1189（4）, c = 12.9720（4） , V = 1139.81（7） ~3 and Z = 4. The Cu（II） cation is fivecoordinated, in an early half-way between square pyramidal and trigonal bipyramidal fashion, by two nitrogen atoms of the 4-amino-6-methoxypyrimidine ligand and three water oxygen atoms. In the atomic arrangement, the organic ligands and the 5-connected Cu centers are linked with each other to give a 1-D corrugated hybrid chain running along the b-axis direction. The chains are interconnected by the SO4^（2-） anions via O–H...O, O–H...S, C–H...O and N–H...O hydrogen bonds to form layers spreading parallel to the（011） plane. The vibrational absorption bands were identified by infrared spectroscopy. Quantitative measurements of the second harmonic generation（SHG） of a powdered sample at 1064 nm were performed and a relative efficiency of 5.2 times the KDP standard was observed. Magnetic properties were also defined to characterize the complex. Magnetic measurements revealed that this material had a onedimensional antiferromagnetic character. The magnetic parameters were g = 2.11 and 2J/k B = -36 K.

关键词： Square pyramid Cu(II) complex X-ray diffraction Magnetic properties Second harmonic generation

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Aspartate transaminase to platelet ratio index in hepatitis C virus and Schistosomiasis coinfection

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World Journal of Gastroenterology 2015年第46期21卷 13132-13139页

作者： Moutaz Derbala Mohammed Elshiekh Elbadri Aliaa Mohamed Amer Saad Al kaabi Khaleel Hassan Sultan Yasser Medhat kamel Eman Hassan Satti Elsayed Tony Yervant Avades Prem Chandra Fatma M Shebl Gastroenterology and Hepatology Hamad Medical CorporationHamad General Hospital Gastroenterology and Hepatology Theodor Bilharz Research Institute Medical Department Weill Cornell Medical College Laboratory Medicine and pathology Hematology SectionHamad Medical CorporationHamad General Hospital General Medicine Medical EducationHamad Medical CorporationHamad General Hospital Department of Laboratory Medicine and Pathology Hamad Medical CorporationHamad General Hospital Medical Research Center Hamad Medical CorporationHamad General Hospital Chronic Disease Epidemiology DepartmentYale School of Public Health

AIM: To assess the diagnostic accuracy,of aminotransferase-to-platelet ratio index(APRI) alone and with antischistosomal antibody(Ab) in patients with hepatitis C virus(HCV) and schistosomiasis coinfection. METHODS: This retrospective study included medical records of three hundred and eighty three Egyptianmen patients who had undergone percutaneous liver biopsy between January 2006 to April 2014 in tertiary care hospital in Qatar for diagnosis or monitoring purpose were selected. Data of patients > 18 years of age were included in the study. The values of HCV RNA titer and antischistosomal antibody titer were also taken into consideration. Patients were excluded from the study if they had any other concomitant chronic liver disease,including; history of previous antiviral or interferon therapy,immunosuppressive,therapy,chronic hepatitis B infection,human immunodeficiency virus co-infection,autoimmune hepatitis,decompensated liver disease,hepatocellular carcinoma,prior liver transplantation,and if no data about the liver biopsy present. RESULTS: Median age of patients was 46 years. About 7.1% had no fibrosis,whereas 30.4%,37.5%,20.4%,and 4.6% had fibrosis of stage Ⅰ,Ⅱ,Ⅲ,and Ⅳ respectively. In bivariate analysis,APRI score,levels of AST,platelet count and age of patient showed statistically significant association with liver fibrosis(P < 0.0001); whereas antischistosomal antibody titer(P = 0.52) and HCV RNA titer(P = 0.79) failed to show a significant association. The respective AUC values for no fibrosis,significant fibrosis,severe fibrosis and cirrhosis of APRI score were 63%,73.2%,81.1% and 88.9% respectively. This showed good sensitivity and specificity of APRI alone for grading of liver fibrosis. But the inclusion of anti-Schistosoma antibody did not improve the prediction of fibrosis stage. CONCLUSION: The study results suggest that noninvasive biochemical markers like APRI are sensitive and specific in diagnosing the degree of fibrosis and cirrhosis in patient

关键词： Hepatitis C Schistosomiasis Aspartate transaminase

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Digestive system involvement and clinical outcomes among COVID-19 patients:A retrospective cohort study from Qatar

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World Journal of Gastroenterology 2021年第46期27卷 7995-8009页

作者： Muhammad Umair Khan Kamran Mushtaq Deema Hussam Alsoub Phool Iqbal Fateen Ata Hammad Shabir Chaudhry Fatima Iqbal Girisha Balaraju Muna A Al Maslamani Betsy Varughese Rajvir Singh Khalid Al Ejji Saad Al kaabi Yasser Medhat kamel Adeel Ajwad Butt Department of Gastroenterology and Hepatology Hamad Medical CorporationDoha 3050Qatar ECPEExecutive and Continuing Professional Education Harvard T.H Chan School of Public HealthBostonMA 02115-5810United States Department of Palliative Care National Center for Cancer Care&ResearchHamad Medical CorporationDoha 3050Qatar Department of Medicine Hamad Medical CorporationDoha 3050Qatar Department of Infectious Disease Communicable Disease CenterHamad Medical CorporationDoha 3050Qatar Department of Cardiology Research Heart HospitalHamad Medical CorporationDoha 3050Qatar Department of Medicine Division of Infectious DiseasesWeill Cornell Medical CollegeNew YorkNY 10075United States Department of Medicine Weill Cornell Medical College-QatarDoha 24144Qatar

BACKGROUND Coronavirus disease 2019(COVID-19)caused by the severe acute respiratory syndrome coronavirus 2 virus most commonly presents with respiratory *** gastrointestinal(GI)manifestations either at presentation or during hospitalization are also common,their impact on clinical outcomes is *** studies have described worse outcomes in COVID-19 patients with GI symptoms,while others have shown either no association or a protective *** is a need for consistent standards to describe GI symptoms in COVID-19 patients and to assess their effect on clinical outcomes,including mortality and disease *** To investigate the prevalence of GI symptoms in hospitalized COVID-19 patients and their correlation with disease severity and clinical *** We retrospectively reviewed 601 consecutive adult COVID-19 patients requiring hospitalization between May 1-15,*** symptoms were recorded at admission and during ***,clinical,laboratory,and treatment data were *** outcomes included all-cause mortality,disease severity at presentation,need for intensive care unit(ICU)admission,development of acute respiratory distress syndrome,and need for mechanical *** logistic regression model was used to identify independent predictors of the adverse *** The prevalence of any GI symptom at admission was 27.1%and during hospitalization was 19.8%.The most common symptoms were nausea(98 patients),diarrhea(76 patients),vomiting(73 patients),and epigastric pain or discomfort(69 patients).There was no difference in the mortality between the two groups(6.21%vs 5.5%,P=0.7).Patients with GI symptoms were more likely to have severe disease at presentation(33.13%vs 22.5%,P<0.001)and prolonged hospital stay(15 d vs 14 d,P=0.04).There was no difference in other clinical outcomes,including ICU admission,development of acute respiratory distress syndrome,or need for mechanical ventil

关键词： COVID-19 Gastrointestinal manifestations Mortality Intensive care unit admission Mechanical ventilation Disease severity

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Treatment of hepatitis C virus genotype 4 with peginterferon alfa-2a: Impact of bilharziasis and fibrosis stage

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World Journal of Gastroenterology 2006年第35期12卷 5692-5698页

作者： MF Derbala SR Al kaabi NZ El Dweik F Pasic MT Butt R Yakoob A Al-Marri AM Amer N Morad A Bener Department of Gastroenterology and Hepatology Hamad Medical Corporation Doha Qatar Department of Immunology Hamad Medical Corporation Doha Qatar Department of Haematology Hamad Medical Corporation Doha Qatar Department of Histopathology Hamad Medical Corporation Doha Qatar Department of Medical Statistics and Epidemiology Hamad Medical Corporation Doha Qatar

AIM： To evaluate pegylated interferon alpha2a （PegIFN-α2a） in Egyptian patients with HCV genotype 4, and the impact of pretreatment viral load, co-existent bilharziasis and histological liver changes on response rate. METHODS： A total of 73 nafve patients （61 with history of bilharziasis） with compensated chronic HCV genotype 4 were enrolled into： group A （38 patients） who received 180 mg PegIFN-alpha2a subcutaneously once weekly for a year and group B （35 patients） received IFN alpha-2a 3 MU 3 times weekly. Ribavirin was added to each regimen at a dose of 1200 mg. Patients were followed for 72 wk and sustained response was assessed. RESULTS： Significant improvement in both end of treatment response （ETR）（P 〈 0.002） and sustained response （SR）（P 〈 0.05） was noted with pegylated interferon, where ETR was achieved in 29 （76.3%） and 14 patients （40%） in both groups respectively, and 25 patients in group A （65.8%） and 9 （25.7%） in group B could retain negative viraemia by the end of follow up period. Sustained virological response （SVR） showed a significant negative correlation with age and positive correlation with pretreatment inflammation in patients receiving PegIFN. Viral clearance after 3 mo of therapy was associated with high incidence of ETR and SR （P 〈 0.001）, but without significant difference between both forms of interferon. Significant improvement in response was achieved in patients with high grade fibrosis （grade 3 and 4） with PegIFN-α2a, where SR was seen in 5 out of 13 patients in group A, but none in group B. There was no significant difference in response between bilharzial and non-bilharzial patients in both groups. In terms of safety and tolerability, neutropenia was the predominant side effect, both drugs were comparable. CONCLUSION： PegIFN-~2a combined with ribavirin results in improvement in sustained response in HCV genotype 4, irrespective of history of bilharzial infestation.

关键词： Hepatitis C virus Genotype 4 Pegasys Bilharziasis

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Urinary Tract Infections in a Tunisian Orthopedic Institute: Major Strain Microbiological Profile

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Advances in Bioscience and Biotechnology 2023年第3期14卷 91-105页

作者： Hajer Kilani Salma Kaoual Fatma kaabi Sophia Bouhalila Besbes Microbiology Unit Clinical Biology Laboratory Mohamed Kassab Institute of Orthopedics Tunis Tunisia Faculty of Medicine LR99ES09 Laboratory of Antibiotic Resistance University of Tunis El Manar Tunis Tunisia Faculty of Pharmacy Department of Biology B University of Monastir Monastir Tunisia

Background: Urinary Tract Infection (UTI) detected in the hospital and in the community is one of the most common reasons for consultation in everyday practice;it represents a major source of antibiotic consumption. This study’s objectives were to outline the microbiological profile of Tunisian patients with UTI and assess antibiotic resistance over the course of three years at the Orthopedic Institute. Methods: All strains identified in urine samples between January 1st, 2019, and December 31st, 2021, were included. Standard laboratory procedures were used to identify the bacterium. The Microscan Walkway 40 Plus was used to do biochemical assays and antibiotic susceptibility testing. The EUCAST criteria were used to interpret the findings. Results: A total of 1313 strains were isolated. The bacteriological study showed the predominance of enterobacteria (96.8%), especially E. coli (52.2%) and K. pneumoniae (19.3%). Overall resistance rates to antimicrobial agents were as follows: for hospital, E. coli strains were in descending order amoxicillin (73.05%), trimeth/sulfamethoxazole (46.9%), ofloxacin (40.3%), amoxicillin/clavulanic acid (35.05%) and gentamicin (20.5%). Our results showed low resistance to fosfomycin for E. coli 2.6% in hospitals while ≥12.1% for K. pneumoniae. Amikacin resistance remains medium-low for E. coli being ≥20% and 10% for K. pneumonia. Nitrofuran resistance has affected 1.06% of E. coli strains in hospital settings and 21.5% of K. pneumoniae. Extended Spectrum Beta-Lactamases (ESBLs) production was present in a number of enterobacteria (19.3% of K. pneumoniae and 14.4% of E. coli). Conclusion: The prevalence of E. coli and K. pneumoniae producers ESBLs in UTI is increasing. Rigorous surveillance of resistance rate is necessary to determine appropriate empirical treatment and limit the spread of multiresistant strains.

关键词： Gram-Negative UTI Hospital Community Bacteria

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Endoscopic ultrasound guided drainage of pancreatic fluid collections: Assessment of the procedure, technical details and review of the literature

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World Journal of Gastrointestinal Endoscopy 2015年第4期7卷 354-363页

作者： Rajesh Puri Ragesh Babu Thandassery Abdulrahman A Alfadda Saad Al kaabi Institute of Digestive Hepatobiliary Sciences Medantathe MedicityGurgaonNCR Delhi 110092India Division of Gastroenterology and Hepatology Department of MedicineHamad Medical Corporation Department of Medicine King Faisal Specialist Hospital and Research Centre

Endoscopic ultrasound(EUS) guided drainage of pancreatic fluid collections(PFC) has become increasingly popular and become first line management option in many centers. Use of therapeutic echoendoscopes has greatly increased the applicability of EUS guided transmural drainage. Drainage is indicated in symptomatic PFCs, PFC related infection, bleed, luminal obstruction, fistulization and biliary obstruction. EUS guided transmural drainage of PFCs is preferred in patients with non bulging lesions, portal hypertension, bleeding tendency and in those whom conventional drainage has failed. In the present decade significant progress has been made in minimally invasive endoscopic techniques. There are newer stent designs, access devices and techniques for more efficient drainage of PFCs. In this review, we discuss the EUS guided drainage of PFCs in acute pancreatitis.

关键词： Acute pancreatitis Pancreatic fluid collections Endoscopic ultrasound-guided drainage

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Significance of platelet count in children admitted with bronchiolitis

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World Journal of Clinical Pediatrics 2017年第2期6卷 118-123页

作者： Amar Al Shibli Najla Alkuwaiti May Hamie Dima Abukhater Muhammad B Noureddin Abdulla Amri Salwa Al kaabi Aysha Al kaabi Mariam Harbi Hassib Narchi Department of Pediatrics Tawam Hospital Department of Pediatrics College of Medicine and Health SciencesUnited Arab Emirates University

AIM To determine the true prevalence of thrombocytosis in children less than 2 years of age with bronchiolitis,its association with risk factors,disease severity and thromboembolic *** A retrospective observational medical chart review of 305 infants aged two years or less hospitalized for *** outcomes included disease severity,duration of hospital stay,admission to pediatric intensive care unit,or *** also included complications of thrombocytosis,including thromboembolic complications such as cerebrovascular accident,acute coronary syndrome,deep venous thrombosis,pulmonary embolus,mesenteric thrombosis and arterial thrombosis and also hemorrhagic complications such as bleeding(spontaneous hemorrhage in the skin,mucous membranes,gastrointestinal,respiratory,or genitourinary tracts).RESULTS The median age was 4.7 mo and 179 were males(59%).Respiratory syncytial virus was isolated in 268(84%),adenovirus in 23(7%) and influenza virus A or B in 13(4%).Thrombocytosis(platelet count > 500 × 109/L) occurred in 88(29%;95%CI:24%-34%),more commonly in younger infants with the platelet count declining with *** was no significant association with the duration of illness,temperature on admission,white blood cell count,serum C-reactive protein concentration,length of hospital stay or admission to the intensive care *** death,thrombotic or hemorrhagic events *** Thrombocytosis is common in children under two years of age admitted with *** is not associated with disease severity or thromboembolic complications.

关键词： Hospitalization Bronchiolitis Platelet count Thrombocytosis Infant Virus diseases

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在未来勘探开发中研发的推动作用

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石油科技论坛 2003年第1期22卷 40-44页

作者： Donald L.Paul Abdulaziz Al-kaabi 刘红

在过去的20年里,尽管油价和经营环境不断发生着变化,但勘探开发的产量和经济效益持续增长着,科学研究和先进技术起了关键作用.未来的勘探开发将更加依赖于先进的技术和科学的研究开发.

关键词：油气勘探开发研究开发经营模式发展趋势

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Immunogenicity and safety of NVSI-06-07 as a heterologous booster after priming with BBIBP-CorV:a phase 2 trial

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Signal Transduction and Targeted Therapy 2022年第7期7卷 2522-2532页

作者： Nawal Al kaabi Yun Kai Yang Jing Zhang Ke Xu Yu Liang Yun Kang Ji Guo Su Tian Yang Salah Hussein Mohamed Saif ElDein Shuai Shao Sen Sen Yang Wenwen Lei Xue Jun Gao Zhiwei Jiang Hui Wang Meng Li Hanadi Mekki Mekki Walid Zaher Sally Mahmoud Xue Zhang Chang Qu Dan Ying Liu Jing Zhang Mengjie Yang Islam Eltantawy Peng Xiao Zhao Nian Wang Jin Liang Yin Xiao Yan Mao Jin Zhang Ning Liu Fu Jie Shen Liang Qu Yun Tao Zhang Xiao Ming Yang Guizhen Wu Qi Ming Li Sheikh Khalifa Medical City SEHAAbu DhabiUnited Arab Emirates College of Medicine and Health Sciences Khalifa UniversityAbu DhabiUnited Arab Emirates China National Biotec Group Company Limited BeijingChina The Sixth Laboratory National Vaccine and Serum Institute(NVSI)BeijingChina National Engineering Center for New Vaccine Research BeijingChina National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention(China CDC)BeijingChina Lanzhou Institute of Biological Products Company Limited LanzhouChina Beijing Key Tech Statistical Consulting Co. LtdBeijingChina Beijing Institute of Biological Products Company Limited BeijingChina Union 71 Abu DhabiUnited Arab Emirates G42 Healthcare Abu DhabiUnited Arab Emirates

The increased coronavirus disease 2019(COVID-19)breakthrough cases pose the need of booster *** conducted a randomised,double-blinded,controlled,phase 2 trial to assess the immunogenicity and safety of the heterologous prime-boost vaccination with an inactivated COVID-19 vaccine(BBIBP-CorV)followed by a recombinant protein-based vaccine(NVSI-06-07),using homologous boost with BBIBP-CorV as *** groups of healthy adults(600 individuals per group)who had completed two-dose BBIBP-CorV vaccinations 1–3 months,4–6 months and≥6 months earlier,respectively,were randomly assigned in a 1:1 ratio to receive either NVSI-06-07 or BBIBP-CorV *** assays showed that in NVSI-06-07 groups,neutralizing antibody geometric mean titers(GMTs)against the prototype SARS-CoV-2 increased by 21.01–63.85 folds on day 28 after vaccination,whereas only 4.20–16.78 folds of increases were observed in control *** Omicron variant,the neutralizing antibody GMT elicited by homologous boost was 37.91 on day 14,however,a significantly higher neutralizing GMT of 292.53 was induced by heterologous *** results were obtained for other SARS-CoV-2 variants of concerns(VOCs),including Alpha,Beta and *** heterologous and homologous boosters have a good safety *** and systemic adverse reactions were absent,mild or moderate in most participants,and the overall safety was quite similar between two booster *** findings indicated that NVSI-06-07 is safe and immunogenic as a heterologous booster in BBIBP-CorV recipients and was immunogenically superior to the homologous booster against not only SARS-CoV-2 prototype strain but also VOCs,including Omicron.

关键词： phase neutral GMT

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Inter-ethnic marriages and severity of coronary artery disease:A multicenter study of Arabian Gulf States

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World Journal of Cardiology 2017年第4期9卷 371-377页

作者： Amin Daoulah Salem Al-kaabi Amir Lotfi Mushabab Al-Murayeh S Ali Nasseri Waleed Ahmed Salah N Al-Otaibi Mohamed N Alama Osama E Elkhateeb Amy J Plotkin Majed M Malak Khalid Alshali Mohamed Hamzi Saleh Al Khunein Mohammed Abufayyah Alawi A Alsheikh-Ali Cardiovascular Department King Faisal Specialist Hospital and Research Center Cardiology Department Zayed Military Hospital Division of Cardiology Baystate Medical CenterTufts University School of Medicine Cardiovascular Department Armed Forces Hospital Southern Region Politecnico di Torino Internal Medicine Department King Faisal Specialist Hospital and Research Center Cardiac Anesthesiology King Faisal Specialist Hospital AND Research Center Cardiology Department King Abdul Aziz University Hospital Cardiology Department King Abdullah Medical City in Holy Capital Department of Pathology Johns Hopkin University Internal Medicine Department King Abdul Aziz University Hospital Anesthesia Department Prince Sultan Military Medical City College of Medicine Mohammed Bin Rashid University of Medicine and Health Sciences Institute of Cardiac Sciences Sheikh Khalifa Medical City

AIM To assess the association of inter-ethnic vs intra-ethnic marriage with severity of coronary artery disease(CAD) in men undergoing *** We conducted a prospective multicenter,multi-ethnic,cross sectional observational study at five hospitals in Saudi Arabia and the United Arab Emirates,in which we used logistic regression analysis with and without adjustment for baseline differences. RESULTS Data were collected for 1068 enrolled patients undergoing coronary angiography for clinical indications during the period of April 1^(st),2013 to March 30^(th),2014. Ethnicities of spouses were available only for male patients. Of those enrolled,687 were married men and constituted the cohort for the present analysis. Intra-ethnic marriages were reported in 70% and inter-ethnic marriages in 30%. After adjusting for baseline differences,interethnic marriage was associated with lower odds of having significant CAD [adjusted odds ratio 0.52(95%CI:0.33,0.81)] or multi-vessel disease(MVD) [adjusted odds ratio 0.57(95%CI:0.37,0.86)]. The adjusted association with left main disease showed a similar trend,but was not statistically significant [adjusted odds ratio 0.74(95%CI:0.41,1.32)]. The association between interethnic marriage and the presence of significant CAD and MVD was not modified by number of concurrent wives(P interaction > 0.05 for both).CONCLUSION Among married men undergoing coronary angiography,inter-ethnic,as compared to intra-ethnic,marriage is associated with lower odds of significant CAD and MVD.

关键词： Arabian Gulf Inter-ethnic marriage Coronary artery disease Cardiac epidemiology Coronary angiography

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