- Rheumatology Clinic, Athens Naval Hospital, Athens, Greece
- Euromedica General Clinic of Thessaloniki, Thessaloniki, Greece
- Olympion Therapeutirion General Clinic, Patras, Greece
- Rheumatology Unit, Agios Andreas Hospital, Patras, Greece
- Laikon General Hospital, Athens, Greece
- 4th Department of Internal Medicine, Hippokrateion General Hospital of Thessaloniki, School of Medicine, Aristotle University, Thessaloniki, Greece
- Evangelismos General Hospital, Athens, Greece
- UCB Pharma, Monheim am Rhein, Germany
G Katsifis, A Theodoridou, A Bounas, P Georgiou, P Sfikakis, K Fragiadaki, T Dimitroulas, E Mole, L Bauer, T Kumke, B Hoepken