Funding for this research was provided by:
Yonsei University College of Medicine (6-2013-0021)
Bio & Medical Technology Development Program of the National Research Foundation (NRF) funded by the Ministry of Science, ICT & Future Planning, Republic of Korea (NRF-2013M3A9B6046416)
the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea (NRF-2015S1A5B8036349)
Text and Data Mining valid from 2018-09-15
Received: 12 December 2017
Accepted: 31 August 2018
First Online: 15 September 2018
Ethics approval and consent to participate
: All procedures of the study were approved by the institutional review boards at the Severance Hospital, Yonsei University, Seoul, South Korea. All participants voluntarily participated in the study, and provided written informed consent prior to participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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