Hirata, Koji
Muroi, Ai
Tsurubuchi, Takao
Fukushima, Hiroko
Suzuki, Ryoko
Yamaki, Yuni
Ishikawa, Eiichi
Matsumura, Akira
Article History
Received: 15 January 2020
Accepted: 6 March 2020
First Online: 10 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: The study was approved by the Ethics Committee of the University of Tsukuba Hospital.