Evaluation of neuroplastic changes in the prefrontal cortex following ketamine administration to patients with treatment-resistant depression assessed by paired association stimulation - Keita Taniguchi; Naotsugu Kaneko; Masataka Wada; Taisuke Yatomi; Mayuko Takano; Yohei Ohtani; Hideaki Tani; Kie Nomoto-Takahashi; Kengo Yonezawa; Sota Tomiyama; Nobuhiro Nagai; Keisuke Kusudo; et al. (Brain Stimulation)