Cobalamin deficiency during treatment of pediatric precursor B‐cell acute lymphoblastic leukemia. Issue 12 (24th July 2021) - Kinoshita, Hiromi; Watanabe, Atsuko; Taji, Yoshitada; Yoshimura, Moe; Ohta, Atsuhiko; Fukushima, Takashi; Tanaka, Ryuhei; Ebihara, Yasuhiro