Na, Soo Jin
Choi, Hee Jung
Chung, Chi Ryang
Cho, Yang Hyun
Jang, Hye Ryoun
Suh, Gee Young
Jeon, Kyeongman http://orcid.org/0000-0002-4822-1772
Funding for this research was provided by:
Samsung Medical Center (OTX0002901)
Article History
Received: 26 July 2018
Accepted: 4 December 2018
First Online: 19 December 2018
Ethics approval and consent to participate
: The institutional review board of the Samsung Medical Center approved this study and waived the requirement for informed consent because of the observational nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.
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