1. Department of MedicineRheumatology UnitKarolinska InstitutetKarolinska University HospitalCenter for Molecular Medicine Stockholm Sweden
2. The Center for ImmunologyUniversity of Minnesota Medical School Minneapolis MN USA
3. Department of Medical Biochemistry and BiophysicsKarolinska Institutet Stockholm Sweden
4. Institute for Research in BiomedicineUniversità della Svizzera italiana Bellinzona Switzerland
5. Division of RheumatologyUniversity Hospitals of Geneva Geneva Switzerland
6. Department of Clinical Immunology and RheumatologyAcademic Medical CenterUniversity of Amsterdam Amsterdam The Netherlands