1. Department of Internal Medicine, Saint George Hospital University Medical Center, Beirut, Lebanon
2. Department of Internal Medicine, Division of Neurology, American University of Beirut Medical Center, Beirut, Lebanon
3. Department of Internal Medicine, Division of Hematology and Oncology, Naef K. Basile Cancer Institute, American University of Beirut Medical Center, Beirut, Lebanon
4. Department of Pediatrics, Clemenceau Medical Center, Faculty of Medical Sciences, Lebanese University, Beirut,, Lebanon
5. Department of Internal Medicine Naef K. Basile Cancer Institute American University of Beirut Medical Center Riad El Solh 1107 2020 Beirut, Lebanon