RT Journal Article SR Electronic T1 Chromosome 15 abnormality in a mentally retarded adult. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 438 OP 441 DO 10.1136/jmg.6.4.438 VO 6 IS 4 A1 Kelly, S A1 Almy, R A1 Dagle, A YR 1969 UL http://jmg.bmj.com/content/6/4/438.abstract AB