title: ETHNIC ASPECTS OF MULTIPLE SCLEROSIS IN CENTRAL AND NORTHERN POLAND.
mesh_terms: D004641:Emigration and Immigration; D004813:Epidemiology; D005006:Ethnicity; D005007:Ethnology; D006801:Humans; D009103:Multiple Sclerosis; D011044:Poland; D013223:Statistics as Topic
keywords: EMIGRATION AND IMMIGRATION; EPIDEMIOLOGY; ETHNOLOGY; MULTIPLE SCLEROSIS; POLAND; STATISTICS