1. Division of Rheumatology, Department of Medicine, Solna, Karolinska Institutet and Karolinska University Hospital, SE-171 76 Stockholm, Sweden
2. Department of Medical Sciences, Cancer Pharmacology and Computational Medicine, Uppsala University, Uppsala SE-751 05, Sweden
3. Department of Oncology-Pathology, Karolinska Institutet, Stockholm SE-171 77, Sweden
4. Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala SE-751 85, Sweden