1. Division of Rheumatology, Department of Internal Medicine; University of Michigan; Ann Arbor Michigan USA
2. Asklepios Clinic Altona; Department of Internal Medicine 4; Hamburg Germany
3. Centre for Interdisciplinary Clinical Immunology, Rheumatology and Auto-inflammatory Diseases-INDIRA and Department of Internal Medicine II; University of Tübingen; Tübingen Germany
4. Molecular Biology Laboratory; Azienda Ospedaliera Arcispedale Santa Maria Nuova, Istituto di Ricovero e Cura a Carattere Scientifico; Reggio Emilia Italy
5. Rheumatology Unit, Department of Internal Medicine, Azienda Ospedaliera Arcispedale Santa Maria Nuova; Istituto di Ricovero e Cura a Carattere Scientifico; Reggio Emilia Italy
6. Department of Rheumatology, Faculty of Medicine; Marmara University; Istanbul Turkey
7. Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center; Cincinnati Ohio USA
8. Cincinnati VA Medical Center; Cincinnati Ohio USA
9. Center for Computational Medicine and Bioinformatics, University of Michigan; Ann Arbor Michigan USA