Ewing's sarcoma in Negroes.
D044383:Black People; D001859:Bone Neoplasms / Q000453:epidemiology*; D002648:Child; D004739:England; D005260:Female; D006801:Humans; D007938:Leukemia / Q000453:epidemiology; D008297:Male; D009549:Nigeria; D012512:Sarcoma, Ewing / Q000453:epidemiology*; D014481:United States; D001741:Black or African American