Affiliation: | (1) Department of Surgery, Meander Medical Centre, Amersfoort, The Netherlands;(2) Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, The Netherlands;(3) National Institute of Public Health and the Environment, Centre for Prevention and Health Services Research, Bilthoven, The Netherlands;(4) Department of Surgery, Meander Medical Centre, P.O. Box 1502, 3800 BM Amersfoort, The Netherlands; |