1. Spedali Civili and University of Brescia, Brescia, Italy; Reumatologia e Immunologia Clinica, Ospedale Civile di Brescia, 25125 Brescia, Italy
2. Spedali Civili and University of Brescia, Brescia, Italy
3. University of Lyon, France
4. University Hospital-Padua, Padova, Italy
5. Ospedale Niguarda, Milan, Italy
6. IRCCS Ist. Auxologico University of Milan, Milan, Italy