1. Internal Medicine, Dow University Hospital, DUHS, Karachi, Pakistan
2. General Surgery, Liaquat National Hospital and Medical College, Karachi, Pakistan
3. Internal Medicine, Liaquat National Hospital and Medical College, Karachi, Pakistan
4. Internal Medicine, Greater Baltimore Medical Centre, Towson, MD, USA
5. Medicine, Dow University Hospital, DUHS, Karachi, Pakistan
6. Internal Medicine, Jinnah Post Graduate Medical Centre, JSMU, Karachi, Pakistan