1. Key Laboratory of Sensing Technology and Biomedical Instruments of Guangdong ProvinceSchool of Biomedical EngineeringSun Yat‐sen University Guangzhou 510275 China
2. Department of StomatologyGuangzhou Women and Children's Medical Center Guangzhou 510275 China
3. Department of EmergencyNanfang HospitalSouthern Medical University Guangzhou 510515 China
4. Division of Engineering in MedicineDepartment of MedicineBrigham and Women's HospitalHarvard Medical School Cambridge MA 02139 USA