Ricci Massimo, Rossi Paolo, De Marco Gabriele, Varisco Valentina, Marchesoni Antonio
UOC Day Hospital of Rheumatology, Istituto Ortopedico G. Pini, Milan, Italy.
Rheumatology (Oxford). 2010 Oct;49(10):2001. doi: 10.1093/rheumatology/keq201. Epub 2010 Jul 3.