Updates are available Correction dated 2019-02-04

Article History

Received: 1 July 2018

Revised: 24 October 2018

Accepted: 22 November 2018

First Online: 17 December 2018

Change Date: 4 February 2019

Change Type: Correction

Change Details: The original version of this article, published on 17 December 2018, unfortunately contained a mistake. The following correction has therefore been made in the original: The name of Jaeseung Shin was presented incorrectly. The corrected author list is given above.

Compliance with ethical standards

:

: The scientific guarantor of this publication is Sung Yoon Park, 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• Cross sectional study• Performed at one institution