1 | Centre for Clinical Research, Uppsala University, Västmanland County Hospital, Västerås, Sweden |
2 | Department of Medicine, Karolinska Institutet, Stockholm, Sweden |
3 | Department of Public Health Sciences, Social Medicine, Karolinska Institutet and Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden |
4 | Reykjavik University, Reykjavik, Iceland |