Funding for this research was provided by:
Kaohsiung Chang Gung Memorial Hospital (CMRPG8G0071-73 and CMRPG8H0981)
Received: 15 July 2019
Accepted: 15 October 2019
First Online: 30 October 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Chang Gung Memorial Hospital (Ref. No. 201800211B0 and No. 201900131B0).
: Not applicable.
: The authors declare that they have no competing interests.