Tight regulation of circulating 1 alpha,25-dihydroxyvitamin D in black children.
D000293:Adolescent; D044383:Black People; D002117:Calcitriol / Q000097:blood*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male
D002117:Calcitriol