Funding for this research was provided by:
Gachon University (GCU-2017-5259)
Article History
Received: 9 May 2018
Revised: 8 June 2018
Accepted: 19 June 2018
First Online: 9 July 2018
Compliance with ethical standards
:
: The scientific guarantor of this publication is Ji Young Jeon, M.D.
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: 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• case-control study/observational• performed at one institution