1. Mälardalen University, School of Health, Care and Social Welfare, Eskilstuna/Västerås, Sweden,
2. R&D Centre/Centre for Clinical Research, Sörmland County Council, Eskilstuna, Sweden
3. Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden, Mälardalen University, School of Health, Care and Social Welfare, Eskilstuna/Västerås, Sweden