Ultra-high dose rate electron FLASH beam irradiation using a modified clinical linear accelerator - Gyu-Seok Cho; Kyo-Tae Kim; Soon-Sung Lee; Jeong-Hwan Kim; Dong-Han Lee; Hong-Suk Chang; Sang-Hyoun Choi; Kum-Bae Kim; Tae-Keun Yang; Dong-Hyun An; Geun-Beom Kim; Kun-Uk Kang; et al. (PLoS ONE, 2026)