Otsuka, Hitomi
Izumi, Makoto
Ota, Eriko
Mochizuki, Noriaki
Article History
Received: 14 January 2020
Accepted: 9 March 2020
First Online: 16 March 2020
Ethics approval and consent to participate
: This study was approved by the ethical review board of the Shinshu Ueda Medical Center on 25 April 2019 (approval number 31-1), and the need for informed consent from patients was waived.
: Not applicable
: The authors declare that they have no competing interests.