Perin, A., E. Zanatta, E. Pigatto, S. Carniello, and F. Cozzi. “Hypovitaminosis D in an Hospitalized Old Population of Western Friuli”. Reumatismo 64, no. 3 (July 19, 2012): 166–171. Accessed April 20, 2024. https://www.reumatismo.org/reuma/article/view/reumatismo.2012.166.