Puri Rajesh, Sud Randhir, Kumar Mandhir, Bhagat Sandeep, Khaliq Abdul
Department of Gastroenterology, Sir Ganga Ram Hospital, New Delhi, India.
Gastrointest Endosc. 2011 Dec;74(6):1400-1; discussion 1401-2. doi: 10.1016/j.gie.2011.07.046. Epub 2011 Oct 1.