Text and Data Mining valid from 2019-05-17
Received: 9 October 2017
Accepted: 29 April 2019
First Online: 17 May 2019
Ethics approval and consent to participate
: This study was approved and monitored by the Research Ethics Review Board of the Chi-Mei Medical Center. Demographic data were anonymously collected.
: Not applicable.
: The authors declare that they have no competing interests.