1. Department of Pathology Osaka University Graduate School of Medicine Yamada‐oka 2‐2 Suita 565‐0871 Japan
2. Department of Pathology Harbin Medical University of China 157 Baojian Road, Harbin Heilongjiang 150081 China
3. Department of Applied Quantum Medical Engineering School of Engineering Tohoku University 6‐6‐02‐3 Aramaki‐aza, Aoba Sendai 980‐8579 Japan