Funding for this research was provided by:
Korean Health Technology R&D Project (HI14C0368)
Received: 16 March 2020
Accepted: 4 February 2021
First Online: 15 February 2021
Ethics approval and consent to participate
: This study was approved by local research ethics committee and all participants signed informed consent before enrollments.
: Not applicable.
: The authors declare no conflicts of interest.