Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST105-2313-B-390-001-MY3)
Text and Data Mining valid from 2019-08-03
Received: 6 May 2019
Accepted: 7 July 2019
First Online: 3 August 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.