1. ZJU-UIUC Institute, Zhejiang University, Haining, China
2. School of Information and Engineering, Sichuan Tourism University, Chengdu, China
3. Department of Kinesiology and Community Health, Rehabilitation Engineering Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA
4. College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China
5. The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China