[1] Netherlands Canc Inst, Radiat Oncol, Amsterdam, Netherlands
[2] Catharina Hosp, Surg, Eindhoven, Netherlands
[3] Erasmus MC, Surg, Rotterdam, Netherlands
[4] Leiden Univ, Med Ctr, Clin Oncol, Leiden, Netherlands
[5] Erasmus MC, Radiat Oncol, Rotterdam, Netherlands
[6] Netherlands Canc Inst, Med Stat, Amsterdam, Netherlands
[7] UMCN St Radboud, Med Oncol, Nijmegen, Netherlands
[8] Catharina Hosp, Radiat Oncol, Eindhoven, Netherlands
[9] Univ Med Ctr Groningen, Med Oncol, Groningen, Netherlands
[10] Netherlands Canc Inst, Dept Gastroenterol, Amsterdam, Netherlands