Celletti Claudia, Castori Marco, Galli Manuela, Rigoldi Chiara, Grammatico Paola, Albertini Giorgio, Camerota Filippo
Umberto I Hospital and Sapienza University, Rome, Italy.
Arthritis Care Res (Hoboken). 2011 May;63(5):775-9. doi: 10.1002/acr.20434.