Maio, T., P. Trezzi, and M.A. Cimmino. “Pure Analgesics in a Rheumatological Outpatient Clinic”. Reumatismo 53, no. 2 (1): 116-121. Accessed June 17, 2021. https://www.reumatismo.org/index.php/reuma/article/view/reumatismo.2001.116.