Lee, Sang Chul
An, Chansik
Yoo, Jongha
Park, Sungho
Shin, Donggyo
Han, Chang Hoon
Article History
Received: 23 October 2020
Accepted: 24 December 2020
First Online: 19 January 2021
Ethics approval and consent to participate
: The Institutional Review Board of National Health Insurance Service Ilsan Hospital (NHIMC 2020-06-005) approved this Health Insurance Portability and Accountability Act-compliant retrospective study and waived the informed consent. All methods were performed in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no conflict of interest.