Photodynamic immunotherapy of cancers based on nanotechnology: recent advances and future challenges. - Liu, Zhaoyuan; Xie, Zhongjian; Li, Wenting; Wu, Xinqiang; Jiang, Xiaofeng; Li, Guanhua; Cao, Liangqi; Zhang, Dawei; Wang, Qiwen; Xue, Ping; Zhang, Han (Journal of Nanobiotechnology, 2021)