Text and Data Mining valid from 2020-01-15
Received: 5 May 2019
Revised: 11 July 2019
Accepted: 8 August 2019
First Online: 15 January 2020
Compliance with ethical standards
: The study was approved by the Taipei Medical University Joint Institutional Review Board (No. N20190387).
: The authors declare that they have no conflict of interest.