1. Department of Medical Decision Making, Leiden University Medical Center, Leiden, The Netherlands
2. Federation of Patients and Consumer Organisations in the Netherlands, Utrecht, The Netherlands
3. Department of Surgery, Bronovo Hospital, The Hague, The Netherlands
4. Department of Medical Decision Making, Leiden University Medical Center, Leiden, The Netherlands, Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
5. Department of Surgery, Diaconessenhuis Leiden, The Netherlands
6. Department of Surgery Leiden University Medical Center, Leiden, The Netherlands
7. Received 26 June 2009 from the Department of Medical Decision Making, Leiden University Medical Center, Leiden, The Netherlands,