1. Institute of Medicine, the Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
2. Department of Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
3. The Institute of Health and Care Sciences, the Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
4. Chronic Disease Prevention Unit, National Institute for Health and Welfare, Helsinki, Finland