1. Department of Medicine, Hamad General Hospital, Doha, Qatar
2. Department of Medicine, Infectious Disease Division, Hamad General Hospital, Doha, Qatar
3. Department of Pediatrics, Infectious Disease Division, Hamad Medical Corporation, Sedra, Doha, Qatar
4. Hematology Division, Al Amal Hospital, Doha, Qatar
5. Medical Intensive Care Unit, Hamad General Hospital, Doha, Qatar
6. Department of Microbiology, Hamad General Hospital, Doha, Qatar