Affiliation: | Sandra C Donkervoort, Emile A Clous, Department of Surgery, Onze Lieve Vrouwe Gasthuis, Amsterdam 1090 HM, NetherlandsLea M Dijksman, Bert van Ramshorst, Djamila Boerma, Department of Research and Epidemiology, St. Antonius Hospital, Nieuwegein 3435 CM, NetherlandsAafke H van Dijk, Marja A Boermeester, Department of Surgery, Academic Medical Centre, Amsterdam 1105 AZ, Netherlands |