RT Journal Article SR Electronic T1 Medical genetics: advances in brief JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 444 OP 444 DO 10.1136/jmg.30.5.444-a VO 30 IS 5 A1 Barber, John C K YR 1993 UL http://jmg.bmj.com/content/30/5/444.2.abstract AB