Proton pencil beam scanning ultra-high dose rate 3D lattice radiotherapy: A proof-of-concept FLASH SFRT study. - Wei S; Qi H; Xu L; Selvaraj B; Zhao X; Zheng A; Vermeulen M; Lee NY; Bakst R; Guha C; Tsai P; Kang M; et al. (Medical physics, 2025)