Okawara, Hiroki
Sawada, Tomonori
Matsubayashi, Kohei
Sugai, Keiko
Tsuji, Osahiko
Nagoshi, Narihito
Matsumoto, Morio
Nakamura, Masaya
Article History
Received: 3 July 2019
Revised: 2 December 2019
Accepted: 4 December 2019
First Online: 12 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: We certify that all applicable institutional and governmental regulations concerning the ethical use of human volunteers were followed during the course of this research. The study protocol was conducted in compliance with ethical guidelines for medical and health research involving human subjects and approved by the Ethics Committees of Keio University School of Medicine (Approval no. 20150355).