[1] Univ Genoa, Lab Expt Rheumatol, Dept Internal Med, Genoa, Italy
[2] Univ Genoa, Acad Div Clin Rheumatol, Dept Internal Med, Genoa, Italy
[3] Slagelse Hosp, Dept Emergency & Internal Med, Slagelse, Denmark
[4] Pomeranian Med Univ, Dept Rheumatol Internal Med Geriatr & Clin Immuno, Szczecin, Poland
[5] Azienda Sanit Napoli 3 Sud, Rheumatol Outpatient Clin, Internal & Geriatr Med Dept, Poliambulatorio Mariano Lauro, Hlth Dist 59, Naples, Italy