1. Rheumatological Clinic, Ospedale ‘Carlo Urbani’, Università Politecnica delle Marche, Jesi (Ancona), Italy
2. Rheumatology Unit, University of Messina, Messina, Italy
3. Department of Medicine, H. Soroka Medical Center, Ben Gurion University of the Negev, Beer Sheva, Israel
4. Department of Internal Medicine H, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
5. Department of Internal Medicine 1, Saarbrücken, Germany
6. Rheumatology Unit, Internal Medicine Department, ASST Fatebenefratelli-Sacco, Milano Statale University School of Medicine, Milan, Italy