1 Department of Gastroenterology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
2 Department of Medical Parasitology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
3 Department of Surgical Gastroenterology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
4 Department of Gastroenterology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India. rana.surindersingh@pgimer.edu.in.