Kim, Il Young
Park, In Seong
Kim, Min Jeong
Han, Miyeun
Rhee, Harin
Seong, Eun Young
Lee, Dong Won
Lee, Soo Bong
Kwak, Ihm Soo
Song, Sang Heon http://orcid.org/0000-0002-8218-6974
Chung, Hyun Chul
Article History
Received: 22 November 2017
Accepted: 6 May 2018
First Online: 19 May 2018
Compliance with ethical standards
:
: The authors have declared that no conflict of interest exists.
: 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.
: For the retrospective type of this study formal consent is not required.