Park, Sohyun
Paeng, Jin Chul
Kang, Chang Hyun
Cheon, Gi Jeong http://orcid.org/0000-0002-1360-5186
Kang, Keon Wook
Chung, June-Key
Lee, Dong Soo
Article History
Received: 28 November 2017
Accepted: 15 February 2018
First Online: 3 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures were performed in accordance with the principles of the 1975 Declaration of Helsinki (2000 revision). The study design and exemption from informed consent were approved by the Institutional Review Board of Seoul National University Hospital (1306-088-498).
: Informed consent was waived because of the retrospective nature of this study.