Einbeigi, Zakaria, et al. “BRCA1 Gene Mutations May Explain More Than 80% of Excess Number of Ovarian Cancer Cases After Breast Cancer – a Population Based Study from the Western Sweden Health Care Region”. Acta Oncologica, vol. 49, no. 3, Jan. 2010, pp. 361-7, doi:10.3109/02841860903521095.