1. Department of Gastroenterology, Dayanand Medical College, Ludhiana, India.
2. Department of Internal Medicine, Dayanand Medical College, Ludhiana, India.
3. Department of Gastroenterology and Human Nutrition, All India Institute of Medical Sciences, New Delhi, India.
4. Department of Genetics, University of Delhi South Campus, New Delhi, India.
5. Department of Community Health Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Canada.
6. Department of Pathology, Dayanand Medical College, Ludhiana, India.
7. Department of Pharmacology, Dayanand Medical College, Ludhiana, India.