1. Division of Cardiovascular Medicine, Department of Medical and Health Sciences; Linköping University; Linköping Sweden
2. Research Department; Innlandet Hospital, and Hedmark University College; Elverum Norway
3. Norwegian Institute of Public Health; Oslo Norway
4. Retired, former Swedish Defence Research Agency; Linköping Sweden
5. Department of Social and Welfare studies. Department of Medical and Health Sciences; Linköping University; Norrköping Sweden
6. Department of Medical Sciences; Uppsala University; Uppsala Sweden