Wilco C Peul1, Annelien L Bredenoord2, Wilco C H Jacobs3. 1. Department of Neurosurgery, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, Netherlands Department of Neurosurgery, Medical Centre Haaglanden, PO Box 432, 2501 CK The Hague, Netherlands w.c.peul@lumc.nl. 2. Department of Medical Humanities, Julius Centre, University Medical Centre Utrecht, Netherlands. 3. Department of Neurosurgery, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, Netherlands.