RT Journal Article SR Electronic T1 An unstable ring chromosome in a female infant with hypotonia, seizures, and retarded development. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 134 OP 138 DO 10.1136/jmg.3.2.134 VO 3 IS 2 A1 L Atkins A1 R T Sceery A1 M E Keenan YR 1966 UL http://jmg.bmj.com/content/3/2/134.abstract AB