Feasibility study: spot-scanning proton arc therapy (SPArc) for left-sided whole breast radiotherapy. - Chang, Sheng; Liu, Gang; Zhao, Lewei; Dilworth, Joshua T.; Zheng, Weili; Jawad, Saada; Yan, Di; Chen, Peter; Stevens, Craig; Kabolizadeh, Peyman; Li, Xiaoqiang; Ding, Xuanfeng (Radiation Oncology, 2020)