[1] Osped Infermi, Dept Surg, Colorectal Surg, Viale Stradone 9, I-48018 Faenza, Italy
[2] Osped Infermi Faenza, Dept Surg, Colorectal Surg, Viale Stradone 9, I-48018 Faenza, Italy
[3] Univ Bologna, Bologna, Italy
[4] Univ Penn, Dept Surg, Div Colon & Rectal Surg, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] Humanitas Univ, Humanitas Res Hosp, Colon & Rectal Surg, Rozzano Milano, Italy
[6] Univ Oslo, Oslo Univ Hosp, Dept Geriatr Med, Oslo, Norway
[7] Joan XXIII Univ Hosp, Dept Gen & Digest Surg, Coloproctol Unit, Tarragona, Spain
[8] Univ Hosp Leuven, Dept Abdominal Surg, Leuven, Belgium
[9] Royal Devon & Exeter Hosp, Exeter Surg Hlth Serv Res Unit, Exeter, Devon, England
[10] Univ Amsterdam, Acad Med Ctr, Dept Surg, Amsterdam, Netherlands
[11] Oxford Univ Hosp, Churchill Hosp, Dept Colorectal Surg, Oxford, England
[12] Caritas Krankenhaus St Josef, Adipositasmed, Thoraxchirurg, Klin Allgemein, Regensburg, Germany
[13] BOC Oncol Ctr, Dept Med Oncol, CY-2006 Nicosia, Cyprus
[14] Mem Sloan Kettering Canc Ctr, Dept Med, 1275 York Ave, New York, NY 10021 USA
[15] Univ Hosp Modena & Reggio Emilia, Div Oncol, Dept Med & Surg Sci Children & Adults, Modena, Italy
[16] Nice Sophia Antipolis Univ, Dept Radiat Oncol, Ctr Antoine Lacassagne, Nice, France
[17] Clatterbridge Canc Ctr, Liverpool, Merseyside, England
[18] Erasmus MC Med Ctr Rotterdam, Dept Publ Hlth, Rotterdam, Netherlands
[19] Cleveland Clin Florida, Dept Pathol, Weston, FL USA
[20] Queens Univ Belfast, Belfast, Antrim, North Ireland
[21] European Canc Concord, Leeds, W Yorkshire, England
[22] European Canc Patient Coalit, Belfast, Antrim, North Ireland
[23] Cent Manchester Univ Hosp Manchester, Manchester Royal Infirm, HPB Unit, Manchester, Lancs, England
[24] Cleveland Clin Florida, Dept Colorectal Surg, Weston, FL USA
[25] IRCCS, Ist Sci Romagnolo Studio & Cura Tumori IRST, Unit Biostat & Clin Trials, Meldola, Italy
[26] IRCCS, Ist Sci Romagnolo Studio & Cura Tumori IRST, Healthcare Adm, Meldola, Italy
[27] Netherlands Canc Inst, Amsterdam, Netherlands
[28] Univ Maastricht, GROW Sch Oncol & Dev Biol, Maastricht, Netherlands
[29] Catharina Hosp, Dept Surg, Eindhoven, Netherlands
[30] Amer Coll Surg, NAPRC, Natl Canc Programs, Chicago, IL USA
[31] Sahlgrens Univ Hosp, Inst Clin Sci, Dept Surg, Gothenburg, Sweden
[32] Comprehens Canc Org Netherlands, Dept Res, Utrecht, Netherlands