1. Department of Surgery, St Antonius Hospital, Nieuwegein, The Netherlands
2. Department of Medical Microbiology, St Antonius Hospital, Nieuwegein, The Netherlands
3. Department of Clinical Pharmacology, St Antonius Hospital, Nieuwegein, The Netherlands
4. Department of Clinical Epidemiology, St Antonius Hospital, Nieuwegein, The Netherlands
5. Department of Surgery, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands
6. Department of Surgery, Catharina Hospital, Eindhoven, The Netherlands
7. Department of Surgery, Tergooi Hospital, Hilversum, The Netherlands
8. Department of Surgery, Gelre Hospital, Apeldoorn, The Netherlands
9. Department of Internal Medicine, St Antonius Hospital, Nieuwegein, The Netherlands
10. Department of Surgery, Academic Medical Centre, Amsterdam, The Netherlands