1. 1Department of Medical Sciences, Uppsala University, Uppsala, Sweden
2. 2Department of Internal Medicine, Mariehamn, Åland, Finland
3. 3Department of Internal Medicine, Mälar Hospital, Eskilstuna, Sweden
4. 4Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
5. 5Centre for Clinical Research, Falu Hospital, Falun, Sweden