1. Department of Gastroenterology, Apollo Hospitals, Guwahati, Assam, India
2. Department of Internal Medicine, Apollo Hospitals, Guwahati, Assam, India
3. Department of Pathology, Apollo Hospitals, Guwahati, Assam, India
4. Department of Pathology, Metropolis Ekopath, Guwahati, Assam, India