Comparative geography of rheumatic fever and rheumatic heart disease, multiple  sclerosis, and rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000453:epidemiology*; D005843:Geography; D006801:Humans; D009103:Multiple Sclerosis / Q000453:epidemiology*; D012213:Rheumatic Fever / Q000453:epidemiology*; D012214:Rheumatic Heart Disease / Q000453:epidemiology*; D014481:United States