1. School of Automation, Chengdu University of Information Technology, Chengdu, China
2. School of Intelligent Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
3. Key Laboratory of Convergence Medical Engineering System and Healthcare Technology, Ministry of Industry and Information Technology, Beijing Institute of Technology, Beijing, China
4. Department of Intelligent Mechanical Systems Engineering, Kagawa University, Takamatsu, Japan