Rana Surinder S, Bhasin Deepak K, Appasani Sreekanth, Rao Chalapathi, Singh Kartar
Department of Gastroenterology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Gastrointest Endosc. 2012 Sep;76(3):669-71. doi: 10.1016/j.gie.2012.04.001. Epub 2012 Jul 15.