RT Journal Article SR Electronic T1 Congenital malformations and childhood neoplasms. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 321 OP 326 DO 10.1136/jmg.14.5.321 VO 14 IS 5 A1 Leck, I YR 1977 UL http://jmg.bmj.com/content/14/5/321.abstract AB