RT Journal Article SR Electronic T1 A T to C mutation in the polypyrimidine tract of the exon 9 splicing site of the RB1 gene responsible for low penetrance hereditary retinoblastoma JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP e21 OP e21 DO 10.1136/jmg.39.5.e21 VO 39 IS 5 A1 Lefévre, S H A1 Chauveinc, L A1 Stoppa-Lyonnet, D A1 Michon, J A1 Lumbroso, L A1 Berthet, P A1 Frappaz, D A1 Dutrillaux, B A1 Chevillard, S A1 Malfoy, B YR 2002 UL http://jmg.bmj.com/content/39/5/e21.abstract AB