RT Journal Article SR Electronic T1 British Medical Bulletin JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 157 OP 157 DO 10.1136/jmg.3.2.157 VO 3 IS 2 A1 Kalmus, H. YR 1966 UL http://jmg.bmj.com/content/3/2/157.1.abstract AB