Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (107-2621-M-197 -001, 106-2923-E-197-002-MY3, 106-2221-E-197-020-MY3)
Text and Data Mining valid from 2019-11-18
Received: 20 July 2019
Accepted: 25 October 2019
First Online: 18 November 2019
Ethics approval and consent to participate
: Not applicable.
: All authors consented to the publication of the work.
: The authors declare that they have no competing interests.