Editor's note.
Graduate Schools of Engineering and Biomedical Engineering, Tohoku University, Sendai, Miyagi, Japan. kanai.hiroshi.e7@tohoku.ac.jp.
Hiroshi
H
Kanai
D003299:Cooperative Behavior; D006801:Humans; D012106:Research; D012940:Social Problems / Q000517:prevention & control; D012955:Societies, Medical; D014463:Ultrasonography; D014495:Universities