Oh, Se-yang
Lim, Yong Cheol
Shim, Yu Shik
Song, Jihye
Park, Sang Kyu
Sim, Sook Young
Kim, Myeong Jin
Shin, Yong Sam
Chung, Joonho http://orcid.org/0000-0003-2745-446X
Article History
Received: 13 February 2018
Accepted: 11 April 2018
First Online: 20 April 2018
Compliance with ethical standards
:
: The authors 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. For this type of retrospective study formal consent is not required.