Shutoh, Fumihiro
Masuda, Tomoyuki http://orcid.org/0000-0001-6429-9468
Sasaki, Tetsuya
Takei, Yosuke http://orcid.org/0000-0002-5026-8027
Article History
Received: 22 June 2020
Accepted: 11 January 2021
First Online: 24 January 2021
Compliance with ethical standards
:
: The author declares that they have no conflicts of interest.
: Ethical approval was obtained from the Medical Ethics Committee of the University of Tsukuba (#1137). Informed consent was obtained from all donors and their families.