title: Birth factors and retinal vascular caliber in a twin study.
authors.forename: Ning
authors.initials: N
authors.lastname: Cheung
mesh_terms: D001724:Birth Weight / Q000502:physiology*; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D055806:Microvessels / Q000033:anatomy & histology / Q000196:embryology; D012171:Retinal Vessels / Q000033:anatomy & histology* / Q000196:embryology*; D014427:Twins