Frallonardo, P., R. Ramonda, A. Lo Nigro, V. Modesti, C. Campana, and L. Punzi. “The Natural History of Ankylosing Spondylitis in the 21st Century”. Reumatismo 63, no. 1 (March 30, 2011): 49–54. Accessed November 23, 2024. https://www.reumatismo.org/reuma/article/view/reumatismo.2011.49.