Contouring compliance and variability of targets and organs at risk in spine stereotactic body Radiotherapy: A 34-Institution study. Kei Ito, Yujiro Nakajima, Naoki Nakamura, Yoshinori Ito, Teiji Nishio, Takashi Mizowaki, Radiation Therapy Study Group of the Japan Clinical Oncology Group (JCOG-RTSG) Radiother Oncol. In-press, DOI: 10.1016/j.radonc.2025.110877
Palliative stereotactic body radiotherapy for spinal and non-spinal bone metastases: combining tradition and innovation. Kei Ito, Naoki Nakamura Int J Clin Oncol. In-press, DOI: 10.1007/s10147-025-02750-0
Randomized phase III study comparing re-irradiation stereotactic body radiotherapy and conventional radiotherapy for painful spinal metastases: Japan Clinical Oncology Group study JCOG2211 (RESCORE study). Ryosuke Kita, Kei Ito, Ryunosuke Machida, Yuta Sekino, Naoki Nakamura, Yujiro Nakajima, Tetsuo Saito, Nobuki Imano, Haruhiko Fukuda, Yoshinori Ito, Takashi Mizowaki, Japan Clinical Oncology Group Radiation Therapy Study Group Jpn J Clin Oncol. 55(2):189-193. 2025 Feb, DOI: 10.1093/jjco/hyae145