[1] Ajou University School of Medicine,Department of Gastroenterology
[2] Ajou University School of Medicine,Department of Occupational and Environmental Medicine
[3] IRCAD,Department of Digestive and Endocrine Surgery, Hôpital Civil de Strasbourg
[4] Research Institute Against Cancer of the Digestive System,undefined
[5] Institut de Recherche Contre Les Cancers de L’Appareil Digestif (IRCAD),undefined