Kwon, Eun Jin
You, Young-Ah
Park, Bohyun
Ha, Eun Hee
Kim, Hae Soon
Park, Hyesook
Kim, Young Ju
Funding for this research was provided by:
National Research Foundation of Korea (2016 R1D1A1A09918620)
Korea National Institute of Health (HI15C2059)
Article History
Received: 21 February 2017
Accepted: 27 March 2018
First Online: 29 March 2018
Ethics approval and consent to participate
: We obtained written informed consent from parents or guardians before enrollment of the participant in this study. This study was approved by the Institutional Review Board of the Ewha Womans University Hospital (ECT 13-01A-13).
: Not applicable.
: All authors declare that they have no competing interests.
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