Effects of Tai Chi Yunshou exercise on community-based stroke patients: a cluster randomized controlled trial oleh Guanli Xie, Ting Rao, Lili Lin, Zhengkun Lin, Tianshen Xiao, Ming’ge Yang, Ying Xu, Jinmei Fan, Shufang Lin, Jinsong Wu, Xiaodong Feng, Li Li, Jing Tao, Lidian Chen