Ozawa, Tsuyoshi http://orcid.org/0000-0003-0055-6829
Hashiguchi, Yojiro
Ishihara, Soichiro
Hayama, Tamuro
Tsuchiya, Takeshi
Nozawa, Keijiro
Yamauchi, Shinichi
Sugihara, Kenichi
Matsuda, Keiji
Article History
Accepted: 26 August 2020
First Online: 31 August 2020
Compliance with ethical standards
: The study was approved by the Central Institutional Review Board (Tokyo Medical and Dental University) and local ethics committee (Teikyo University ethics committee No. 19-127).
: The authors declare that they have no conflict of interest.