A cephalometric study of the craniofacial variations in twins.
D000293:Adolescent; D002508:Cephalometry; D002648:Child; D005145:Face / Q000033:anatomy & histology*; D005147:Facial Bones / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D012886:Skull / Q000033:anatomy & histology*; D014427:Twins