Funding for this research was provided by:
National Science Council (MOST 104-2314-B-075A-005-MY3)
Text and Data Mining valid from 2018-12-01
Received: 6 August 2018
Accepted: 7 November 2018
First Online: 5 December 2018
Ethics approval and consent to participate
: The Institutional Review Board of Taichung Veterans General Hospital approved this study (CE14307B), and written consent was obtained from each participant according to the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.