1. VU University Medical Center; Department of General Practice and Elderly Care Medicine, EMGO Institute for Health and Care Research; PO Box 7057 Amsterdam Netherlands 1007 MB
2. University College London; Division of Psychiatry; c/o Research & Development, North East London NHS Foundation Trust Goodmayes Hospital, Barley Lane London UK IG3 8XJ
3. VU University Medical Center; Department of Psychiatry, EMGO Institute for Health and Care Research; PO Box 7057 Amsterdam Netherlands 1007 MB
4. University of Nottingham; Institute of Mental Health; Triumph Road Nottingham Nottinghamshire UK