1. Sahlgrenska University Hospital, Department of Internal Medicine, Gothenburg, Sweden
2. Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Department of Internal Medicine and Clinical Nutrition, Gothenburg, Sweden
3. Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Department of Microbiology and Immunology, Gothenburg, Sweden
4. Södra Älvsborg Hospital, Department of Internal Medicine, Borås, Sweden