Lee, Hwan Hee
Paeng, Jin Chul
Cheon, Gi Jeong
Lee, Dong Soo
Chung, June-Key
Kang, Keon Wook
Article History
Received: 9 May 2018
Revised: 2 July 2018
Accepted: 24 July 2018
First Online: 8 August 2018
Compliance with Ethical Standards
:
: Hwan Hee Lee, Jin Chul Paeng, Gi Jeong Cheon, Dong Soo Lee, June-Key Chung, and Keon Wook Kang declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The study design of the retrospective analysis and exemption of informed consent were approved by the Institutional Review Board of the Seoul National University Hospital (H-1804-008-932).