Motor imagery based brain-computer interface control of continuous passive motion for wrist extension recovery in chronic stroke patients. - Lu, Rong-Rong; Zheng, Mou-Xiong; Li, Jie; Gao, Tian-Hao; Hua, Xu-Yun; Liu, Gang; Huang, Song-Hua; Xu, Jian-Guang; Wu, Yi (Neuroscience Letters, 2020)