Yi, Bo Ram
Kim, Hyun Jeong
Park, Hye Sook
Cho, Yoon Jeong
Kim, Ju Young
Yee, Jeong
Chung, Jee Eun
Kim, Joo Hee
Lee, Kyung Eun
Gwak, Hye Sun http://orcid.org/0000-0003-0278-2563
Funding for this research was provided by:
National Research Foundation of Korea (2010-0026225)
Article History
Received: 25 April 2018
Accepted: 20 July 2018
First Online: 27 July 2018
Ethics approval and consent to participate
: The study protocol was approved by ethics committee of the Ewha Womans University Mokdong Hospital Institutional Review Board, and written consent was obtained from the parents of each subject.
: Not applicable
: The authors declare that they have no competing interests.
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