Sunit Kumar Shukla1, Vinod Kumar Dixit2. 1. Department of Gastroenterology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221 005, India. sunitshuklabhu@gmail.com. 2. Department of Gastroenterology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221 005, India.