Rossini M, D’Avola G, Muratore M, Malavolta N, Silveri F, Bianchi G, et al. Regional differences of vitamin D deficiency in rheumatoid arthritis patients in Italy. Reumatismo [Internet]. 2013 Jul. 23 [cited 2024 Nov. 25];65(3):113-20. Available from: https://www.reumatismo.org/reuma/article/view/reumatismo.2013.113