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Prospective Study
Paola Sessa, Matteo Nicola Dario Di Minno, Rosella Tirri, Carmine Finelli, Gabriele Valentini, Giovanni Tarantino 
World J Rheumatol 4(1):1-5. Published online Mar 12, 2014. doi: 10.5499/wjr.v4.i1.1