Identification of a novel <it>CHEK2 </it>variant and assessment of its contribution to the risk of breast cancer in French Canadian women oleh Cardinal Guy, Rossiny Vanessa, Zhang Phil, Hamel Nancy, Ghadirian Parviz, Chen Long, Novak David J, Robidoux André, Tonin Patricia N, Rousseau Francois, Narod Steven A, Foulkes William D