[1] Centre for Clinical Research,Department of Medicine
[2] Uppsala University,School of Health, Care and Social Welfare
[3] Karolinska Institutet,Department of Public Health Sciences, Social Medicine
[4] Faculty of Odontology,undefined
[5] Malmö University,undefined
[6] Mälardalen University,undefined
[7] Karolinska Institutet and Centre for Epidemiology and Community Medicine,undefined
[8] Reykjavik University,undefined