Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST 106-2221-E-002-062 and MOST 107-2221-E-002-121-MY3.)
Text and Data Mining valid from 2019-03-11
Received: 11 August 2018
Accepted: 14 February 2019
First Online: 11 March 2019
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.