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Fioravanti A, Cantarini L, Bacarelli MR, de Lalla A, Ceccatelli L, Blardi P.

Rheumatol. Internat. 2011;31:879-882.  doi: 10.1007/s00296-010-1401-x.

https://pubmed.ncbi.nlm.nih.gov/20237929/