Text and Data Mining valid from 2019-10-26
Received: 19 February 2019
Accepted: 5 September 2019
First Online: 26 October 2019
Ethics approval and consent to participate
: The investigation was approved by the NTUH Research Ethics Committee and verbal informed consent was obtained from the participants in order to expedite the recruitment process and the ethics committee approved this procedure.
: Not applicable.
: The authors declare that they have no competing interests.