1. Department of Psychiatry; St. Antonius Ziekenhuis; Utrecht The Netherlands
2. Department of Psychiatry; Leiden University Medical Center; Leiden The Netherlands
3. Department of Psychiatry; EMGO Institute of Health and Care Research, VU Medical Center; Amsterdam The Netherlands
4. Department of Old Age Psychiatry; Parnassia; Den Haag The Netherlands
5. Department of Psychiatry; CAPRI--University of Antwerp; Antwerp Belgium
6. Department of Public Health and Primary Care; Leiden University Medical Center; Leiden The Netherlands