Marcucci, E., E. Bartoloni, A. Alunno, M.C. Leone, G. Cafaro, F. Luccioli, V. Valentini, E. Valentini, G.M.C. La Paglia, A.F. Bonifacio, and R. Gerli. “Extra-Articular Rheumatoid Arthritis”. Reumatismo 70, no. 4 (December 20, 2018): 212-224. Accessed June 18, 2019. https://reumatismo.org/index.php/reuma/article/view/1106.