Text and Data Mining valid from 2019-12-01
Received: 10 June 2019
Accepted: 17 October 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: Ethics approval was obtained from the clinical research ethics committee at Tokushima University Hospital (approval number 2593) and Tokushima Prefectural Central Hospital (approval number 1739). Informed consent to participate in the study was also obtained from patients or from an authorized surrogate.
: Not applicable
: The authors declare that they have no competing interests