Guzik, Agnieszka, and Andrzej Kwolek. “The Prevalence and Distribution of Multiple Sclerosis in Poland and Around the World”. European Journal of Clinical and Experimental Medicine 13, no. 1 (February 7, 2026): 55–62. Accessed February 7, 2026. https://journals.ur.edu.pl/ejcem/article/view/12533.