1. VieCuri Medical Centre of Northern Limburg; Department of Surgery; Venlo Netherlands
2. Deventer Ziekenhuis; Emergency Department; Deventer Netherlands
3. VieCuri Medical Centre of Northern Limburg; Venlo Netherlands
4. VieCuri Medical Centre of Northern Limburg; Department of Clinical Epidemiology; Tegelseweg 210 Venlo Netherlands 5912 BL