Racial differences in sacral structure important in caudal anesthesia.
D000328:Adult; D000763:Anesthesia, Caudal; D000767:Anesthesia, Epidural; D044383:Black People; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012447:Sacrum / Q000502:physiology*; D044465:White People