Al-Azhar Faculty of medicine, Rheumatology Department, Cairo, Egypt
Al-Azhar university hospitals, Cairo, Egypt
OB/GYN Departments, Al-Hussein University Hospital, Al-Azhar University, Cairo, Egypt
Al-Azhar university hospitals, Cairo, Egypt
National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt
MOHAMED Alboraie, Cairo, Egypt
Helwan University, Cairo, Egypt
Erasme Hospital, Gastroenterology Department, Université Libre de Bruxelles (ULB), Brussels, Belgium
Faculty of Medicine, Zagazig University, Zagazig, Sharkia, Egypt
Singapore General Hospital, Singapore, Singapore
Ain Shams Universty, Cairo, Nasr City, Egypt