Cho, Hyun-Jin
Lee, Won
Jeon, Man-Kyung
Park, Jai-Oong
Yang, Eun-Jung
Article History
Received: 29 November 2018
Accepted: 15 March 2019
First Online: 1 April 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest to disclose.
: The need for informed consent was waived by the institutional review board of the Cheil General Hospital because the study was retrospective. The study conformed to the principles of the Declaration of Helsinki.
: For this type of study, informed consent is not required.