title: Hematocrit values of youths 12-17 years.
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D044383:Black People; D001800:Blood Specimen Collection; D002648:Child; D003710:Demography; D004522:Educational Status; D005260:Female; D006306:Health Surveys; D006400:Hematocrit / Q000379:methods; D006801:Humans; D007182:Income; D008297:Male; D011786:Quality Control; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D014481:United States; D044465:White People; D001741:Black or African American