1. Departments of Internal Medicine (M.J.H.J.D., F.H.d.J., J.W.K., S.W.J.L.),3000 CA Rotterdam, The Netherlands
2. Epidemiology (M.J.H.J.D., H.T., H.J.L., M.K., A.H.),3000 CA Rotterdam, The Netherlands
3. Psychiatry (H.T.),3000 CA Rotterdam, The Netherlands
4. Child and Adolescent Psychiatry (H.T.), Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands
5. Division of Medical Sciences (P.M.S.), Institute of Biomedical Research, University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham B15 2TT, United Kingdom