Koh, Jieun
Park, Ah Young
Ko, Kyung Hee
Jung, Hae Kyoung
Article History
Received: 28 October 2018
Revised: 28 February 2019
Accepted: 11 April 2019
First Online: 11 June 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Hae Kyoung Jung.
: The authors declare that they have no conflict of interest.
: No complex statistical methods were necessary for this paper.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • retrospective• observational• performed at one institution