1. Department of Laboratory Medicine and Medical Research Unit, Seinäjoki Central Hospital and University of Tampere, Seinäjoki, Finland;
2. Medical Informatics and Statistics Research Group, University of Oulu, Oulu, Finland;
3. Department of Psychiatry, Seinäjoki Central Hospital and University of Tampere, Tampere, Finland;
4. National Institute for Health and Welfare (THL), Helsinki, Finland;
5. The Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland;
6. Joint Municipal Authority for North Karelia Social and Health Services, Joensuu, Finland