1. Research Unit of Psychology, University of Oulu , Oulu, Finland
2. Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki , Helsinki, Finland
3. Department of Psychiatry, Washington University, St. Louis , USA
4. National Institute for Health and Welfare , Helsinki, Finland
5. Department of Clinical Chemistry, Fimlab Laboratories and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Life Sciences, University of Tampere , Tampere, Finland
6. Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Finland; Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital , Turku, Finland