1 Department of Gastroenterology, Post Graduate Institute of Medical Education and Research (PGIMER), Sector 12, Chandigarh, 160012, India.
2 Department of Cytology, Post Graduate Institute of Medical Education and Research (PGIMER), Sector 12, Chandigarh, 160012, India.
3 Department of Surgical Gastroenterology, Post Graduate Institute of Medical Education and Research (PGIMER), Sector 12, Chandigarh, 160012, India.
4 Department of Gastroenterology, Post Graduate Institute of Medical Education and Research (PGIMER), Sector 12, Chandigarh, 160012, India. rana.surindersingh@pgimer.edu.in.