1. Joint Academic Rheumatology Program, Clinical Immunology-Rheumatology Unit, 2nd Department of Medicine and Laboratory, Medical School, National and Kapodistrian University of Athens, General Hospital of Athens “Hippokration”, 115 27 Athens, Greece
2. Joint Academic Rheumatology Program, Rheumatology Unit, First Department of Propaedeutic Internal Medicine, Medical School, National and Kapodistrian University of Athens, “Laiko” General Hospital, 115 27 Athens, Greece
3. Rheumatology Unit, 417 NIMTS Hospital, 115 21 Athens, Greece
4. Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow G12 8QQ, UK
5. Centre for Rheumatic Diseases, School of Immunology and Microbial Sciences, King’s College Hospital, London SE1 9RT, UK
6. Rheumatology Department, King’s College Hospital, London SE5 9RS, UK