1. School of Mechanical and Transportation Engineering, Guangxi University of Science and Technology, Liuzhou, Guangxi, P. R. China
2. MK Smart Robotics Co., Ltd., Shenzhen, Guangdong, P. R. China
3. Department of Neurology, Shenzhen Second People’s Hospital, Shenzhen, Guangdong, P. R. China
4. Shenzhen Institute of Geriatrics, Shenzhen, Guangdong, P. R. China
5. Shenzhen Dapeng New District, Nan’Ao People’s Hospital, Guangdong, P. R. China