Affiliation: | 1. Department of Surgery, Leiden University Medical Center, , Leiden, The Netherlands;2. Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, , Leiden, The Netherlands;3. Department of Surgery, University Medical Center Groningen, University of Groningen, , Groningen, The Netherlands;4. Department of Surgical Oncology, Netherlands Cancer Institute—Antoni van Leeuwenhoek Hospital, , Amsterdam, The Netherlands |