Kiuchi, Kaori
Hasegawa, Kiyoshi http://orcid.org/0000-0002-5823-047X
Watanabe, Mariko
Motegi, Emi
Kosaka, Nobuaki
Fukasawa, Ichio
Article History
Received: 14 May 2020
Accepted: 27 July 2021
First Online: 4 August 2021
Declarations
:
: We declare that we have no conflict of interest.
: The study protocol was approved by the institutional ethical committee of Dokkyo Medical University. All procedures performed in this study were in accordance with the ethical standards of the institutional ethical committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
: This study was approved by the institutional ethical committee of Dokkyo Medical University, and written informed consents was waived because of retrospective design. This policy was accepted by the institutional ethical committee on the condition that a document that declares an opt-out policy by which any patients' relatives could refuse to be included in this study was uploaded on the Web page.