title: "Zwilling" versus "Tai Chi" configuration of double-sized ring chromosome.
authors.forename: Joe J
authors.initials: JJ
authors.lastname: Hoo
authors.forename: Constance K
authors.initials: CK
authors.lastname: Stein
mesh_terms: D002869:Chromosome Aberrations; D002882:Chromosomes, Human, Pair 13; D002891:Chromosomes, Human, Pair 21; D004314:Down Syndrome / Q000235:genetics; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male