Affiliation: | (1) Department of Psychology, University of Helsinki, P.O. Box 9, 00014 University of Helsinki, Finland;(2) Finnish Institute of Occupational Health, Helsinki, Finland;(3) Department of Medicine, University of Kuopio, Kuopio, Finland;(4) National Research and Development Centre for Welfare and Health, Helsinki, Finland;(5) Department of Epidemiology and Public Health, University College London, London, UK |