Comparative nasopharyngeal analysis.
D000293:Adolescent; D000328:Adult; D044383:Black People; D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D009305:Nasopharynx / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D011859:Radiography; D044465:White People