Received: 24 January 2020
Accepted: 31 March 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The Ethics Committee of the Animal Research Division at Hamamatsu University School of Medicine approved the study (approval number 2019025 was provided on 24 May 2019 by President Hiroyuki Konno).
: Not applicable.
: The authors declare that they have no competing interests.