Successful treatment with ponatinib for central nervous system relapse of Philadelphia chromosome‐positive B‐cell acute lymphoblastic leukaemia. Issue 10 (10th October 2019) - Masuda, Kyoko; Nakazato, Tomonori; Nishiyama‐Fujita, Yuriko; Ito, Chisako; Ogura, Shinji; Mizuno, Kota; Kamiya, Takahiro; Aisa, Yoshinobu; Mori, Takehiko