1. Department of Clinical Pharmacology and Pharmacy, Amsterdam University Medical Center, Amsterdam, The Netherlands;
2. Department of Human Resources, Occupational Health Services, Ziekenhuis de Gelderse Vallei, Ede, The Netherlands;
3. Department of Hospital Pharmacy, Meander Medical Center, Amersfoort, The Netherlands;
4. Department of Human Resources, Occupational Health, Safety & Environment Service, Nijmegen, The Netherlands;
5. Department of Human Resources, Healthteam, Haaglanden Medical Center, The Hague, The Netherlands;
6. Caesar Consult Nijmegen, Nijmegen, The Netherlands