Arai, Junya
Kato, Jun
Toda, Nobuo
Kurokawa, Ken
Shibata, Chikako
Kurosaki, Shigeyuki
Funato, Kazuyoshi
Kondo, Mayuko
Takagi, Kaoru
Kojima, Kentaro
Ohki, Takamasa
Seki, Michiharu
Tagawa, Kazumi
Article History
Received: 28 March 2020
Accepted: 13 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The Ethics Committee of Mitsui Memorial Hospital approved this retrospective study, which conformed to the provisions of the Declaration of Helsinki (as revised in Fortaleza, Brazil, October 2013). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institution and/or national research committee and with 1964 Helsinki declaration and its amendments or comparable ethical standards. For this type of study formal consent is not required.
: Not applicable.
: The authors declare that they have no competing interests.