Affiliation: | 1. Department of Medical Psychology, Vrije Universiteit, Amsterdam, The Netherlands;2. Department of Social Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands;3. Netherlands Haemophilia Society, Badhoevedorp, The Netherlands;4. Department of Internal Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands;5. Department of Epidemiology and Biostatistics and the Institute for Research in Extramural Medicine (EMGO Institute), Vrije Universiteit, Amsterdam, The Netherlands;6. Department of Clinical Epidemiology, University Hospital Leiden, Leiden, The Netherlands |