Received: 25 April 2019
Accepted: 24 September 2019
First Online: 14 October 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of Chang Gung Memorial Hospital (IRB number: 100-0038A3) and registered in ClinicalTrials.gov website (registration number: NCT02206321).
: Not applicable in our study.
: The authors declare that they have no competing interests.