Memberships
- Dutch Royal Academy of Medicine, Utrecht, 1978-
- Syndicat des Médecins Anatomo-Cytopathologistes Francais, Toulouse, France, 1986-1998
- Société Francaise de Pathologie, Toulouse, France, 1997-2004
- Association of Physicians of Assurance Medicine, 1996-2004
- Association VIA, Association of Assessment and Advising Physicians, Eindhoven, Netherlands, 1999-2004
- General Association for Counsellors, Amsterdam, 2005-2010
- Mozart Association, Oegstgeest, 1996-2010
- Association of ´Friends of the Song´, Amsterdam, 2000-