Received: 14 March 2019
Accepted: 30 December 2019
First Online: 13 January 2020
Ethics approval and consent to participate
: The institutional review board of the Catholic University of Korea approved the research protocol (KC17RESI0736). All participants provided written consent forms prior to data collection.
: The written informed consent for publication of identifying patient/clinical data and identifiable images was obtained.
: The authors declare that they have no competing interests.