Text and Data Mining valid from 2019-09-02
Received: 7 May 2019
Accepted: 26 August 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: Ethical approval was not required because the study followed a secondary data analysis design. This was confirmed by the Asia University Medical Research Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.