1 1 Assistant Professor, Gastroenterology, Department of Gastroenterology and Cytology, Postgraduate Institute of Medical Education and Research, PGIMER, Chandigarh, India.
2 2 Professor, Gastroenterology, Department of Gastroenterology and Cytology, Postgraduate Institute of Medical Education and Research, PGIMER, Chandigarh, India.
3 3 Senior Resident, Gastroenterology, Department of Gastroenterology and Cytology, Postgraduate Institute of Medical Education and Research, PGIMER, Chandigarh, India.
4 4 Professor, Cytology, Department of Gastroenterology and Cytology, Postgraduate Institute of Medical Education and Research, PGIMER, Chandigarh, India.