1. Department of Family Medicine, Hamad Medical Corporation, Doha, Qatar;
2. Dresden International University, Dresden, Germany;
3. Department of Neurosurgery, Hamad Medical Corporation, Doha, Qatar;
4. Weill Cornell Medicine, Doha, Qatar;
5. Department of Infectious Disease, Hamad Medical Corporation, Doha, Qatar;
6. Department of Internal Medicine, Hamad Medical Corporation, Doha, Qatar