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Authors
Tagawa, Kaname
Ra, Song-Gyu
Choi, Youngju
Yoshikawa, Toru
Kumagai, Hiroshi
Maeda, Seiji https://orcid.org/0000-0003-1642-4644
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Article History
Received: 5 January 2021
Accepted: 6 March 2021
First Online: 17 April 2021
Declarations
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: The authors declare no conflict of interests.
: Ethics Committee of University of Tsukuba approved this study (approval Tai 27-69 dated October 13th, 2015), which was performed in line with the principles of Declaration of Helsinki.
: Informed consent was obtained from all the participants.
