Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST 107-3017-F-020-002)
Ministry of Education (MOST 107-3017-F-020-002)
Text and Data Mining valid from 2019-08-10
Received: 10 June 2019
Accepted: 4 August 2019
First Online: 10 August 2019
Compliance with ethical standards
: The authors declare that they have no conflicts of interest.
: This article does not contain any studies with animals performed by any of the authors.