1. Radboud University Medical Center; Radboud Institute for Health Sciences, IQ Healthcare; Nijmegen The Netherlands
2. Faculty of Health and Social Studies; HAN University of Applied Sciences; Nijmegen The Netherlands
3. Department of Surgery; Scheper Hospital; Emmen The Netherlands
4. Department of Surgery; Hospital Gelderse Vallei; Ede The Netherlands
5. Department of Surgery; Van Weel Bethesda Hospital; Dirksland The Netherlands
6. Department of Surgery; Laurentius Hospital; Roermond The Netherlands
7. Department of Surgery; Radboud University Medical Center; Nijmegen The Netherlands