Loss of activating EGFR mutant gene contributes to acquired resistance to EGFR tyrosine kinase inhibitors in lung cancer cells. oleh Keisuke Tabara, Rina Kanda, Kahori Sonoda, Takuya Kubo, Yuichi Murakami, Akihiko Kawahara, Koichi Azuma, Hideyuki Abe, Masayoshi Kage, Aki Yoshinaga, Tomoko Tahira, Kenshi Hayashi, Tokuzo Arao, Kazuto Nishio, Rafael Rosell, Michihiko Kuwano, Mayumi Ono