53BP1 loss rescues BRCA1 deficiency and is associated with triple-negative and BRCA-mutated breast cancers. by Bouwman, P, Aly, A, Escandell, J, Pieterse, M, Bartkova, J, van der Gulden, H, Hiddingh, S, Thanasoula, M, Kulkarni, A, Yang, Q, Haffty, BG, Tommiska, J, Blomqvist, C, Drapkin, R, Adams, D, Nevanlinna, H, Bartek, J, Tarsounas, M, Ganesan, S, Jonkers, J