RT Journal Article SR Electronic T1 Phenotypic expression of double heterozygosity for BRCA1 and BRCA2 germline mutations JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP e20 OP e20 DO 10.1136/jmg.2004.027243 VO 42 IS 3 A1 Leegte, B A1 van der Hout, A H A1 Deffenbaugh, A M A1 Bakker, M K A1 Mulder, I M A1 ten Berge, A A1 Leenders, E P A1 Wesseling, J A1 de Hullu, J A1 Hoogerbrugge, N A1 Ligtenberg, M J L A1 Ardern-Jones, A A1 Bancroft, E A1 Salmon, A A1 Barwell, J A1 Eeles, R A1 Oosterwijk, J C YR 2005 UL http://jmg.bmj.com/content/42/3/e20.abstract AB