Funding for this research was provided by:
This research was supported by the Ministry of Environment and by Brain Korean 21 Plus.
Text and Data Mining valid from 2018-04-21
Received: 6 August 2017
Accepted: 6 April 2018
First Online: 21 April 2018
Ethics approval and consent to participate
: Study protocols and consent forms were approved by the Institutional Review Boards at Ewha Womans University School of Medicine, Dankook University Hospital, and Ulsan University Hospital, respectively. All participants provided informed consent to participate in the study.
: All authors, E Lee, H Kim, H Kim, EH Ha, and N Chang, declare that they have no competing interests.
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