Ryohei, Onishi, Japanese Red Cross Osaka Hospital Akinari Nomura, Japanese Red Cross Osaka Hospital Tomoaki Okada, Japanese Red Cross Osaka Hospital Susumu Inamoto, Japanese Red Cross Osaka Hospital Seiichiro Kanaya, Japanese Red Cross Osaka Hospital Yoshiharu Sakai, Japanese Red Cross Osaka Hospital

Sampson-Dávila. J, MútuaTerrassa University Hospital, Spain Lin. Q, MútuaTerrassa University Hospital, Spain Romero-Marcos. JM, MútuaTerrassa University Hospital, Spain Carlota Cuenca-Gómez, MútuaTerrassa University Hospital, Spain Joan Altet-Torné, MútuaTerrassa University Hospital, Spain Salvadora Delgado-Rivilla, MútuaTerrassa University Hospital, Spain

Filotico. M, University of Naples Federico II Ambrosio. L, University of Naples Federico II Rega. D, National Cancer Institute Pascale Foundation, Naples Maniscalco. M, University of Napoli Luigi Vanvitelli Ugo Pace, National Cancer Institute Pascale Foundation, Naples Paolo Del Rio, National Cancer Institute Pascale Foundation, Naples

Sung-Bum Kang, National University Hospital, Seoul, Korea Hong-min Ahn, National University Hospital, Seoul, Korea Min Hyeong Jo, National University Hospital, Seoul, Korea Mi Jeong Chi, National University Hospital, Seoul, Korea Heung-Kwon Oh, National University Hospital, Seoul, Korea Duck-Woo Kim, National University Hospital, Seoul, Korea

Toshikatsu Nitta, Shiroyama Hospital, Japan Taki Masataka, Shiroyama Hospital, Japan Ryutaro Kubo, Shiroyama Hospital, Japan Norihrio Hosokawa, Shiroyama Hospital, Japan Masatsugu Ishii, Shiroyama Hospital, Japan Takashi Ishibashi, Shiroyama Hospital, Japan

Ítalo Beltrão Pereira Simões, Institute of Cancer, São Paulo Erica Sakamoto, Institute of Cancer, São Paulo Carlos Sergio Nahas, Institute of Cancer, São Paulo Ribeiro Ulysses Junior, Institute of Cancer, São Paulo Carlos Frederico Sparapan Marques, Institute of Cancer, São Paulo André Roncon Dias, Institute of Cancer, São Paulo

Clara Fernández, University Hospital, Madrid J Gutierrez, University Hospital, Madrid O García Villar, University Hospital, Madrid Javier García-Borda, University Hospital, Madrid Eduardo Ferrero, University Hospital, Madrid Julia Gutiérrez de Prado, University Hospital, Madrid

Juan Bellido-Lugue, Hospital Universitario Virgen Macarena Andrea Scammon-Duran, Hospital Universitario Virgen Macarena Inmaculada Sanchez-Matamoros, Hospital Universitario Virgen Macarena Angel Nogales Munoz, Hospital Universitario Virgen Macarena Salvador Morales-Conde, Hospital Universitario Virgen Macarena

Avanish Saklani, Tata Memorial Hospital, Mumba Ankit Sharma, Tata Memorial Hospital, Mumba Sanket Bankar, Tata Memorial Hospital, Mumba Mufaddal Kazi, Tata Memorial Hospital, Mumba Ashwin Desouza, Tata Memorial Hospital, Mumba

Minglin Zhang, Zhujiang Hospital of Southern Medical University Chun Ye, Zhujiang Hospital of Southern Medical University RenLi Huang, Zhujiang Hospital of Southern Medical University ZhaoWei Zou, Zhujiang Hospital of Southern Medical University

Rajesh S. Shinde, Apollo Hospital, Mumbai Mashru Deep, Apollo Hospital, Mumbai Murali. V, Apollo Hospital, Mumbai

Carlo Alberto Manzo, University of Milan Valerio Celentano, Chelsea and Westminster Hospital, UK

Yogesh Bansod, Tata Memorial Hospital Department of Surgery Ankit Sharma, Tata Memorial Hospital Department of Surgery Ashwin DeSouza, Tata Memorial Hospital Department of Surgery Mufaddal Kazi, Tata Memorial Hospital Department of Surgery Thumkur surappa Shylasree, Aberdeen Royal Infirmary Avanish Saklani, Tata Memorial Hospital Department of Surgery

Angi Wang, Shanghai Changzheng Hospital Weiling Tian, Shanghai Changzheng Hospital Jia Zang, Shanghai Changzheng Hospital Haiyang Zhou, Shanghai Changzheng Hospital

Masashi Miguchi, Hiroshima University Hospital Satoshi Ikeda, Hiroshima University Hospital Yoshihito Kitamura, Hiroshima University Hospital Mizuki Yamaguchi, Hiroshima University Hospital Hideki Nakahara, Hiroshima University Hospital

Sanket Bankar, Homi Bhabha National Institute Yogesh Bansod, Homi Bhabha National Institute Prudvi Raj, Homi Bhabha National Institute Mufaddal Kazi, Homi Bhabha National Institute Ashwin DeSouza, Homi Bhabha National Institute Avanish Saklani, Homi Bhabha National Institute

Luigi Brusciano; University of Campania, Italy Flagiello. L Antonio Brillantino Gambardella. C; University of Campania, Italy Saverio Francesco Lucido; University of Campania, Italy Ludovico Docimo; University of Campania, Italy

Fraser Sneddon; Raigmore Hospital, UK Colin Richards; Raigmore Hospital, UK Raymond Oliphant; Raigmore Hospital, UK

Authors' Names and Affiliations J, Geraldine Ooi; Memorial Sloan Kettering Cancer Center Department of Surgery Narasimhan, Vignesh; Memorial Sloan Kettering Cancer Center Department of Surgery Weiser, Martin; Memorial Sloan Kettering Cancer Center Department of Surgery

Steven Wexner; Cleveland Clinic, Florida Peter Rogers; Cleveland Clinic, Florida Justin Dourado; Cleveland Clinic, Florida Zachary Delgado; Cleveland Clinic, Florida Felice De Stefano; Cleveland Clinic, Florida Pauline Aeschbacher ; Cleveland Clinic, Florida