1 Department of Value Based Healthcare, St Antonius Hospital, Nieuwegein, The Netherlands.
2 Department of Surgery, St Antonius Hospital, Nieuwegein, The Netherlands.
3 Department of Surgery, MeanderMC, Amersfoort, The Netherlands.
4 Radboud Institute for Health Sciences, Scientific Center for Quality of Healthcare (IQ Healthcare), Radboud University Medical Center, Nijmegen, The Netherlands.
5 Cancer Center, Utrecht University Medical Center, Utrecht University, Utrecht, The Netherlands.
6 Department of Surgery, Martini Hospital, Groningen, The Netherlands.
7 Department of Surgery, University Medical Center Groningen, Groningen, The Netherlands.