1. Department of Electrical Engineering and Information Systems The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113–8656 Japan
2. Department of Dermatology Keio University School of Medicine 35 Shinanomachi Shinjuku‐ku Tokyo 160–8582 Japan
3. Center for Integrative Medical Sciences RIKEN 1‐7‐22 Suehiro‐cho, Tsurumi‐ku Yokohama City Kanagawa 230‐0045 Japan