Letter: Turner's, Ullrich's, and Noonan's syndromes.
D002902:Chromosomes, Human, 16-18; D005260:Female; D006801:Humans; D008297:Male; D011666:Pulmonary Valve Stenosis / Q000145:classification; D012729:Sex Chromosome Aberrations / Q000145:classification*; D013577:Syndrome; D014424:Turner Syndrome / Q000145:classification*