1. School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China.
2. Educational Physiology Laboratory, Graduate School of Education, The University of Tokyo, Tokyo 113-0033, Japan.
3. GLAM—Group on Language, Audio, & Music, Imperial College London, London SW7 2AZ, UK.
4. Chair of Embedded Intelligence for Health Care and Wellbeing, University of Augsburg, 86159 Augsburg, Germany.