Kang, Du-Young http://orcid.org/0000-0002-0037-7217
Oh, Tae Yun
Article History
Received: 6 December 2019
Accepted: 14 May 2020
First Online: 21 May 2020
Compliance with Ethical Standards
: This study was approved by our institutional review board. Informed consent from individual patients was waived because this study was conducted through analyses of historical patient’s records.
: The authors declare that they have no conflict of interest.