[1] Univ Utrecht, Univ Med Ctr Utrecht, Dept Surg, Utrecht, Netherlands
[2] Univ Utrecht, Univ Med Ctr Utrecht, Dept Radiat Oncol, Utrecht, Netherlands
[3] Univ Vienna, Med Univ Vienna, Dept Surg, Vienna, Austria
[4] Ghent Univ Hosp, Dept Radiat Oncol, Ghent, Belgium
[5] Leuven Univ, KU Leuven, Dept Med Oncol, Leuven, Belgium
[6] Leuven Univ, KU Leuven, Dept Radiat Oncol, Leuven, Belgium
[7] Leuven Univ, KU Leuven, Dept Surg, Leuven, Belgium
[8] AZ Sint Maarten, Dept Radiat Oncol, Mechelen, Sint Maarten
[9] Masaryk Univ, Masaryk Mem Canc Inst, Dept Comprehens Canc Care, Brno, Czech Republic
[10] Masaryk Univ, Fac Med, Brno, Czech Republic
[11] Aarhus Univ, Aarhus Univ Med Ctr, Danish Ctr Particle Therapy, Aarhus, Denmark
[12] Aarhus Univ, Aarhus Univ Med Ctr, Dept Radiat Oncol, Aarhus, Denmark
[13] Univ Odense, Odense Univ Med Ctr, Dept Med Oncol, Odense, Denmark
[14] Tallinn Univ, Tallinn Univ Hosp, Dept Med Oncol, Tallinn, Estonia
[15] Univ Montpellier, Dept Med Oncol, INSERM, IRCM,ICM, Montpellier, France
[16] Univ Lille, CANTHER Canc Heterogene Plast & Resistance Therap, Dept Surg, CNRS,Inserm,CHU Lille,UMR9020,U1277, F-59000 Lille, France
[17] Univ Cologne, Univ Hosp Cologne, Dept Surg, Cologne, Germany
[18] Univ Leipzig, Univ Hosp Leipzig, Dept Med Oncol, Leipzig, Germany
[19] Univ Leipzig, Univ Hosp Leipzig, Dept Visceral Transplant Thorac & Vasc Surg, Leipzig, Germany
[20] Johannes Gutenberg Univ Mainz, Dept Med, Johannes Gutenberg Univ Clin, Mainz, Germany
[21] Univ Tubingen, Univ Tubingen Hosp, Dept Radiat Oncol, Tubingen, Germany
[22] Natl & Kapodistrian Univ Athens, Sch Med, Dept Surg, Athens, Greece
[23] Trinity Coll Dublin, St James Hosp, Dept Surg, Dublin, Ireland
[24] IRCCS Azienda Osped Univ Bologna, Dept Radiat Oncol, Bologna, Italy
[25] San Raffaele Vita Salute Univ, Hosp San Raffaele, Dept GI Surg, Milan, Italy
[26] Humanitas Univ, Dept Biomed Sci, Via Rita Levi Montalcini 4, I-20072 Milan, Italy
[27] Univ Cattolica Sacro Cuore, Dipartimento Univ Diagnost Immagini Radioterapia, Rome, Italy
[28] Fdn Policlin Univ Agostino Gemelli, Dept Surg, Rome, Italy
[29] Univ Siena, Siena Univ Hosp, Dept Surg, Siena, Italy
[30] Univ Verona, Dept Surg Dent Paediat & Gynaecol, Gen & Upper GI Div, Verona, Italy
[31] Univ Amsterdam, Amsterdam Univ Med Ctr, Dept Surg, Amsterdam, Netherlands
[32] Univ Amsterdam, Amsterdam Univ Med Ctr, Dept Radiat Oncol, Amsterdam, Netherlands
[33] Netherlands Canc Inst, Dept Gastroenterol, Antoni van Leeuwenhoek, Amsterdam, Netherlands
[34] Netherlands Canc Inst, Dept Med Oncol, Antoni van Leeuwenhoek, Amsterdam, Netherlands
[35] Netherlands Canc Inst, Dept Surg, Antoni van Leeuwenhoek, Amsterdam, Netherlands
[36] Radiotherapiegrp, Dept Radiat Oncol, Deventer, Netherlands
[37] Univ Groningen, Univ Med Ctr Groningen, Dept Radiat Oncol, Groningen, Netherlands
[38] Leiden Univ, Univ Med Ctr Leiden, Dept Med Oncol, Leiden, Netherlands
[39] Leiden Univ, Univ Med Ctr Leiden, Dept Radiat Oncol, Leiden, Netherlands
[40] Leiden Univ, Univ Med Ctr Leiden, Dept Surg, Leiden, Netherlands
[41] Catharina Med Ctr, Dept Med Oncol, Eindhoven, Netherlands
[42] Catharina Med Ctr, Dept Radiat Oncol, Eindhoven, Netherlands
[43] Catharina Med Ctr, Dept Surg, Eindhoven, Netherlands
[44] GROW Sch Oncol & Dev Biol, Dept Radiat Oncol MAASTRO, Maastricht, Netherlands
[45] Radboud Univ Nijmegen Med Ctr, Dept Radiat Oncol, Nijmegen, Netherlands
[46] Univ Rotterdam, Erasmus Univ Med Ctr, Dept Surg, Rotterdam, Netherlands
[47] Elisabeth Tweesteden Ziekenhuis Tilburg, Dept Med Oncol, Tilburg, Netherlands
[48] Univ Utrecht, Univ Med Ctr Utrecht, Dept Med Oncol, Utrecht, Netherlands
[49] Jagiellonian Univ, Coll Med, Dept Surg, Krakow, Poland
[50] Med Univ Lublin, Dept Surg Oncol, Lublin, Poland