title: Comparative x-ray investigations of the morphology of twins.
mesh_terms: D001842:Bone and Bones / Q000000981:diagnostic imaging*; D005260:Female; D005528:Foot / Q000000981:diagnostic imaging; D006225:Hand / Q000000981:diagnostic imaging; D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D008297:Male; D011247:Pregnancy; D013902:Radiography, Thoracic; D012886:Skull / Q000000981:diagnostic imaging; D013131:Spine / Q000000981:diagnostic imaging; D014427:Twins