Text and Data Mining valid from 2020-02-12
Received: 15 August 2019
Accepted: 14 January 2020
First Online: 12 February 2020
Ethics approval and consent to participate
: The Research Ethics Committee of National Taiwan University Hospital approved this study (IRB No.: 201510009RINB).
: Not applicable. The present study did not contain any individual person’s data in any form.
: The authors declare that they have no competing interests.