Funding for this research was provided by:
Ministry of Health and Welfare (M07F5193, M06F4035, M04F4027, M03F4037, M05F5044)
Text and Data Mining valid from 2019-04-22
Received: 3 October 2018
Accepted: 21 March 2019
First Online: 22 April 2019
Compliance with ethical standards
: The authors declare that they have no competing interests.
: Joint Institutional Review Board of Taipei Medical University (N201805048).