title: Multiple sclerosis in the Orkney and Shetland Islands. VI: The effects of migration and social structure.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D004641:Emigration and Immigration; D005190:Family; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000453:epidemiology*; D012737:Sex Factors; D012946:Social Welfare; D006113:United Kingdom