1. Department of Surgery, Radboud University Medical Centre, 6525 GA Nijmegen, The Netherlands
2. Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital Basel, University of Basel, 4051 Basel, Switzerland
3. Department of Surgery, Yitzhak Shamir Medical Centre, Tel Aviv 7030083, Israel
4. Clinic for Anesthesiology and Pain Therapy, Hospital of Fribourg, 1752 Fribourg, Switzerland
5. Faculty of Medicine, University of Basel, 4001 Basel, Switzerland
6. Clinic for Anesthesiology, Intermediate Care, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, 4031 Basel, Switzerland
7. Department of Clinical Research, University of Basel, 4031 Basel, Switzerland