Kim, A-Sol http://orcid.org/0000-0003-2497-9500
Ko, Hae-Jin http://orcid.org/0000-0003-4460-1476
Article History
Received: 9 May 2018
Accepted: 3 September 2018
First Online: 6 September 2018
Compliance with Ethical Standards
:
: A-Sol Kim and Hae-Jin Ko declare that they have no conflicts of interest regarding the publication of this article.
: This study was approved by the institutional review board at Kyungpook National University Chilgok Hospital, which waived the requirement for informed consent as this was a retrospective analysis. This study was performed in accordance with the Ethical Standards as laid down in the 1964 Declaration of Helsinki and its later amendments.