1. Internal Medicine, Icahn School of Medicine at Mount Sinai-Elmhurst Hospital, New York, USA
2. Internal Medicine, Abington Jefferson Health, Abington, PA, USA
3. Internal Medicine, Dow University Health Sciences, Karachi, Pakistan
4. Internal Medicine, Fauji Foundation Hospital, Rawalpindi, Pakistan
5. Internal Medicine, King Edward Medical College, Lahore, Pakistan
6. Detroit Medical Center, Wayne State University, Detroit, Michigan, USA