Sanjay Nagral1, Anita Jain2, Samiran Nundy3. 1. Department of Surgical Gastroenterology, Jaslok Hospital and Research Centre, Mumbai 400026, India sanjaynagral@gmail.com. 2. The BMJ, India. 3. Ganga Ram Institute for Postgraduate Medical Education and Research, Sir Ganga Ram Hospital, New Delhi, India.