1. Rheumatology UnitDepartment of MedicineKarolinska University Hospital‐SolnaStockholmSweden
2. Department of Physiology and PharmacologyKarolínska InstitutetStockholmSweden
3. Division of Rheumatology and ImmunologyDuke University Medical CenterDurhamNorth CarolinaUSA
4. Department of Women's and Children's HealthKarolinska University Hospital‐SolnaStockholmSweden