1 Department of Surgery, Orbis Medical Center, Sittard-Geleen, The Netherlands; Department of Surgery, St Antonius Hospital, Nieuwegein, The Netherlands. Electronic address: j.van.vugt@antoniusziekenhuis.nl.
2 Department of Surgery, Orbis Medical Center, Sittard-Geleen, The Netherlands.
3 Department of Surgery, St Antonius Hospital, Nieuwegein, The Netherlands.
4 Department of Surgery, Medical Center Alkmaar, Alkmaar, The Netherlands; Trial Center Holland Health, Alkmaar, The Netherlands.