Evaluation of germline BRCA1 and BRCA2 mutations in a multi-ethnic Asian cohort of ovarian cancer patients by Hasmad, HN, Lai, KN, Wen, WX, Park, DJ, Nguyen-Dumont, T, Kang, PCE, Thirthagiri, E, Ma'Som, M, Lim, BK, Southey, M, Woo, YL, Teo, S-H