Savio G Barreto1, Amit Dutt2. 1. Department of Gastrointestinal Surgery, Gastrointestinal Oncology and Bariatric Surgery, Medanta Institute of Digestive and Hepatobiliary Sciences, Medanta-The Medicity, Gurgaon, Haryana, India ; 2. The Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Kharghar, Navi Mumbai, Maharashtra, India.