[1] Hippokrateion Hosp, Athens, Greece
[2] Maria Vittoria Hosp, Cardiol, Turin, Italy
[3] Osped Papa Giovanni XXIII, Internal Med, Bergamo, Italy
[4] Univ Athens, Sch Med, Hippokrat Gen Hosp, Dept Med & Lab,Clin Immunol & Rheumatol Unit, GR-11527 Athens, Greece
[5] Univ Genoa, Giannina Gaslini Inst, Genoa, Italy
[6] Dept Pediat, Genoa, Italy