1 Department of Surgical Oncology, University Medical Center Groningen, P.O. 30.001, 9700, RB, Groningen, the Netherlands. Electronic address: m.j.h.metman@umcg.nl.
2 Department of Surgery, Erasmus Medical Center Rotterdam, P.O. 2040, 3000, CA, Rotterdam, the Netherlands. Electronic address: i.loncar@erasmusmc.nl.
3 Department of Surgical Oncology, University Medical Center Groningen, P.O. 30.001, 9700, RB, Groningen, the Netherlands. Electronic address: s.kruijff@umcg.nl.
4 Department of Surgery, Amsterdam UMC, location VUmc, Postbus 7057, 1007, MB, Amsterdam, the Netherlands. Electronic address: a.f.engelsman@amsterdamumc.nl.
5 Department of Surgery, Erasmus Medical Center Rotterdam, P.O. 2040, 3000, CA, Rotterdam, the Netherlands. Electronic address: t.vanginhoven@erasmusmc.nl.