1. University Medical Center Utrecht; Division of Anesthesiology, Intensive Care and Emergency Medicine; PO Box 85500 mailstop: Q04.2.313 Utrecht Netherlands 3508 GA
2. Leiden University Medical Center; Department of Intensive Care; PO Box 9600 Leiden Netherlands 2300 RC
3. University Medical Center Utrecht; Department of Perioperative Care and Emergency Medicine; PO Box 85500 Mailstop: E 03.511 Utrecht Netherlands 3508 GA
4. Leiden University Medical Center; Department of Clinical Epidemiology; PO Box 9600 Leiden Netherlands 2300 RC
5. University Medical Center Utrecht (STR 6.131); Julius Center for Health Sciences and Primary Care; PO Box 85500 Utrecht Netherlands 3508 GA