1. Department of Psychiatry, Faculty of Medicine, Syrian Private University, Damascus, Syria
2. Department of Psychiatry, Faculty of Medicine, Damascus University, Damascus, Syria
3. Department of Internal Medicine, Faculty of Medicine, Syrian Private University, Damascus, Syria
4. Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon
5. Department of Internal Medicine, Hamad General Hospital Administration, Hamad Medical Corporation, Doha, Qatar