1. Department of Occupational Medicine, Danish Ramazzini Centre, Regional Hospital West Jutland, University Clinic, Herning, Denmark
2. Department of Psychology and Behavioral Sciences, Aarhus University, Aarhus C, Denmark
3. Department of Psychology, University of Southern Denmark, Odense M, Denmark
4. Department of Affective Disorders, Aarhus University Hospital - Skejby, Aarhus N, Denmark