1. Department of Internal Medicine, Rochester General Hospital, NY, USA
2. Department of Internal Medicine, St. Elizabeth’s Medical Center, Tufts School of Medicine, Boston, MA, USA;
3. Department of Internal Medicine, Henry Ford Hospital, MI, USA
4. Department of Gastroenterology, Saint Louis University, MO, USA
5. Department of Internal Medicine, Ayub Medical college, Pakistan
6. Department of Dental Medicine, Lahore Medical and Dental College, Pakistan
7. Department of Internal Medicine, Gian Sagar Medical College and Hospital, Punjab, India
8. Department of Gastroenterology, Baylor University Medical Center, Dallas, USA