RT Journal Article SR Electronic T1 Dr John Alexander Fraser Roberts, CBE, FRS, MA, DSc, MD, FRCP, FRCPsych JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 442 OP 444 DO 10.1136/jmg.24.7.442 VO 24 IS 7 A1 Marcus E Pembrey YR 1987 UL http://jmg.bmj.com/content/24/7/442.abstract AB