Huh, Sungchul http://orcid.org/0000-0002-7740-8050
Ko, Hyun-Yoon http://orcid.org/0000-0001-5506-7219
Article History
Received: 4 December 2019
Revised: 10 March 2020
Accepted: 12 March 2020
First Online: 3 April 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study procedures were reviewed and approved by the Pusan National University Yangsan Hospital Institutional Review Board for human participants (No. 05-2019-155). We certify that all applicable institutional and governmental regulations concerning the ethical use of human volunteers were followed during the course of this research .