Received: 26 May 2020
Accepted: 19 July 2020
First Online: 3 August 2020
: Ethical approval was waived by the local Ethics Committee of Korea University Anam Hospital in view of the retrospective nature of the study and all the procedures being performed were part of the routine care.
: This manuscript has not been published elsewhere or submitted simultaneously for publication elsewhere. The manuscript has been submitted and there are no special or specific issues in the publication. All the authors give full consent for the publication of this manuscript in the journal.