Article History
Received: 13 December 2019
Accepted: 26 March 2020
First Online: 6 April 2020
Compliance with ethical standards
:
: Nothing to be disclosed.
: The Chungbuk National University Hospital Institutional Review Board reviewed and approved this study.
: The study including human participants has been performed in accordance with the ethical standards of the Declaration of Helsinki and its later amendments.
: For this study, formal consent was not required.