1. School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China
2. Agency for Science, Technology and Research, Institute for Infocomm Research, Fusionopolis, Singapore
3. Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, School of Instrumentation and Optoelectronic Engineering, Research Institute for Frontier Science, Beihang University, Beijing, China
4. Shenzhen International Graduate School, Tsinghua University, Beijing, China
5. Department of Medicine, Division of Rehabilitation Medicine, National University Hospital, Lower Kent Ridge Rd, Singapore
6. School of Computer Science and Engineering, Nanyang Technological University, nanyang, Singapore