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Authors
Qiao, Fei
Jiang, Fei
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Funding
Funding for this research was provided by:
The Medical Science Research Project of Dalian (1711063)
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Article History
Received: 29 May 2019
Accepted: 14 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Ethical Review Board of Dalian Children’s Hospital, 154 Zhongshan Road, Dalian 116012, China (approval number 007–2018). All the participants gave their informed consent.
: Written informed consent was obtained from all guardians for anonymized data analysis and publication.
: The authors declare that they have no competing interests.
