Affiliation: | 1. Department of Gastroenterology, Govind Ballabh Pant Institute of Post Graduate Medical Education and Research, 110002 New Delhi, India;2. Department of Biochemistry, Govind Ballabh Pant Institute of Post Graduate Medical Education and Research, 110002 New Delhi, India;3. Department of Radiology, Govind Ballabh Pant Institute of Post Graduate Medical Education and Research, 110002 New Delhi, India |