Funding for this research was provided by:
Tri-Service General Hospital (TSGH-D-109176)
Received: 1 June 2020
Accepted: 12 August 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: Not obtained as this is a systematic review and meta-analysis of published studies.
: Not applicable. All authors approved for the submission of the manuscript.
: The authors declare that they have no competing interests.