Text and Data Mining valid from 2019-06-03
Received: 13 March 2019
Accepted: 27 May 2019
First Online: 3 June 2019
Ethics approval and consent to participate
: All experiments and animal surgical procedures were approved by the Laboratory Animal Care and Use Committee of Hokkaido University (approval number 13-0057) and performed in accordance with the Guidelines for Animal Experiments at the Graduate School of Medicine, Hokkaido University.
: Not applicable.
: The authors declare that they have no competing interests.