Chung, Mi Sun
Lee, Eun Jung
Kim, Sujin
Kim, Seon-Ok
Byun, Jun Soo http://orcid.org/0000-0003-3210-9505
Article History
Received: 11 March 2019
Revised: 31 October 2019
Accepted: 6 November 2019
First Online: 17 January 2020
Compliance with ethical standards
:
: The scientific guarantor of this publication is Prof. Byung Ihn Choi.
: The authors declare that they have no competing interests.
: One of the authors (S.K.) has significant statistical expertise.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • retrospective• observational• performed at one institution