1. Department of Geriatrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
2. College of Electrical Engineering, Chongqing University, Chongqing, China
3. Department of Human Anatomy, Institute of Neuroscience, Chongqing Medical University, Chongqing, China
4. College of Computer Science, Chongqing University, Chongqing, China