1. Department of Dental Medicine Karolinska Institutet Huddinge Sweden
2. Department of Medicine Karolinska Institutet Karolinska University Hospital Solna Sweden
3. Clinical Epidemiology Unit Karolinska Institutet Solna Sweden
4. Department of Clinical Sciences Lund Clinical Physiology, and Skåne University Hospital Lund University Lund Sweden
5. Capio S:t Görans Hospital Stockholm Sweden