Text and Data Mining valid from 2020-03-24
Received: 5 May 2019
Accepted: 24 February 2020
First Online: 24 March 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of TOYOTA Memorial Hospital (reference No. R81).
: We received written informed consent from all participants.
: The authors declare that they have no competing interests.