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Authors
Lee, Juyoung
Lee, Jung Hyun https://orcid.org/0000-0002-1849-733X
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Funding
Funding for this research was provided by:
Korean Centers for Disease Control and Prevention (2016-ER6307-01#)
Ministry of Health & Welfare, Republic of Korea (HI14C1062)
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Article History
Received: 12 November 2018
Accepted: 4 June 2019
First Online: 14 June 2019
Ethics approval and consent to participate
: The study was approved by the institutional review board at Bucheon St. Mary’s hospital of the Catholic University of Korea number HC13RNMI0080. Written informed consent to participate in the study was obtained from the parent of the participants. Permission to use the KNN database was obtained from KNN network. Each KNN hospitals’ institutional review board approved data collection for the KNN.
: Not applicable.
: The authors declare that they have no competing interests.
