Funding for this research was provided by:
Korea Health Industry Development Institute (HI17C0778)
Received: 29 May 2020
Accepted: 13 August 2020
First Online: 24 August 2020
Ethics approval and consent to participate
: The Institutional Review Board (IRB) at Cheil General Hospital approved all research included this study (#CGH-IRB-2017-22). Written informed consent was obtained from all participants under the approval from the IRB.
: All authors declare that they have no competing interests.