[1] Univ Groningen, Univ Med Ctr Groningen, Dept Surg Oncol, Groningen, Netherlands
[2] Univ Groningen, Univ Med Ctr Groningen, Wenckebach Inst, Groningen, Netherlands
[3] Netherlands Comprehens Canc Org, Groningen, Netherlands
[4] Isala, Dept Surg Oncol, Zwolle, Netherlands
[5] Netherlands Canc Inst Antoni van Leeuwenhoek, Dept Dermatol, Amsterdam, Netherlands
[6] Leiden Univ, Univ Med Ctr Leiden, Dept Surg Oncol, Leiden, Netherlands