[1] Clinique de Chirurgie Digestive,
[2] Geneva University Hospital,undefined
[3] Rue Micheli-du-Crest 24,undefined
[4] 1211 Geneva 14,undefined
[5] Switzerland e-mail: Claudio.Soravia@hcuge.ch Tel.: +41-22-3727705 Fax: +41-22-3727707,undefined
[6] Registre des Pathologies Héréditaires Digestives,undefined
[7] Geneva University Hospital,undefined
[8] Rue Micheli-du-Crest 24,undefined
[9] 1211 Geneva 14,undefined
[10] Switzerland,undefined
[11] Department of Surgery,undefined
[12] Mount Sinai Hospital,undefined
[13] University of Toronto,undefined
[14] 600 University Avenue,undefined
[15] Toronto,undefined
[16] Ontario M5G 1X5,undefined
[17] Canada,undefined
[18] Familial Gastrointestinal Cancer Registry,undefined
[19] Mount Sinai Hospital,undefined
[20] University of Toronto,undefined
[21] 600 University Avenue,undefined
[22] Toronto,undefined
[23] Ontario M5G 1X5,undefined
[24] Canada,undefined