Funding for this research was provided by:
Kangwon National University Hospital (2018 Kangwon National University Hospital Grant)
Article History
Received: 10 April 2019
Accepted: 20 September 2019
First Online: 21 October 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the Kangwon National University Hospital, and all participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests