1. Department of Surgery; Maastricht University Medical Centre; Maastricht The Netherlands
2. GROW School for Oncology and Developmental Biology; Maastricht The Netherlands
3. Dutch Institute for Clinical Auditing; Leiden The Netherlands
4. Medical Research Data Management; Deventer The Netherlands
5. Department of Surgery; Academic Medical Centre; Amsterdam The Netherlands
6. Department of Surgery; Deventer Hospital; Deventer The Netherlands
7. Department of Surgery; Gelre Hospital; Apeldoorn The Netherlands
8. Department of Surgery; Isala Clinics; Zwolle The Netherlands
9. Department of Surgery; Reinier de Graaf Hospital; Delft The Netherlands
10. Department of Surgery; Aarhus University Hospital; Aarhus Denmark