1. First Department of Cardiology, Athens School of Medicine, Hippokration Hospital, Athens, Greece
2. Centre of Rheumatology, University College London, London, United Kingdom
3. Department of Rheumatology, Patras University Hospital, Faculty of Medicine, University of Patras Medical School, Patras, Greece
4. Onassis Cardiac Surgery Center, Athens, Greece
5. Department of Rheumatology, Dudley Group NHS Foundation Trust, Russells Hall Hospital, Dudley, West Midlands, United Kingdom
6. Fourth Department of Internal Medicine, Hippokration University Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece