Text and Data Mining valid from 2019-11-21
Received: 22 June 2019
Accepted: 13 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: Approval for the study was obtained from the Institutional Review Board of Kanazawa University (approved #2423-2) and conformed to the Declaration of Helsinki.
: Not applicable.
: KK: Grant support from Ono pharmaceutical and Bristol-Myers Squibb. The other authors declare that they have no competing interests.