Relaxation-exchange magnetic resonance imaging (REXI): a non-invasive imaging method for evaluating trans-barrier water exchange in the choroid plexus. - Wu, Xuetao; He, Qingping; Yin, Yu; Tan, Shuyuan; Zhang, Baogui; Li, Weiyun; Hsu, Yi-Cheng; Xue, Rong; Bai, Ruiliang (Fluids & Barriers of the CNS, 2024)