RT Journal Article SR Electronic T1 Ring chromosome 1 associated with radial ray defect. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 400 OP 400 DO 10.1136/jmg.21.5.400 VO 21 IS 5 A1 Gardner, R J A1 Grindley, R M A1 Chewings, W E A1 Clarkson, J E YR 1984 UL http://jmg.bmj.com/content/21/5/400.abstract AB