Funding for this research was provided by:
Ministry of Environment
Brain Korean 21 plus
Text and Data Mining valid from 2018-11-12
Received: 21 March 2018
Accepted: 23 October 2018
First Online: 12 November 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.
: Not applicable.
: The authors declare that they have no competing interests.
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