BRCA1 Mutation Analysis in a Portuguese Population with Early-Onset Breast and/or Ovarian Cancer. Issue 1 (17th June 2013) - Soares, Raquel; van Eijk, Ronald; Dias, Aureliano; Botelho, Mónica; Costa, Carla; Amendoeira, Isabel; Lopes, Carlos; Devilee, Peter; Schmitt, Fernando