Funding for this research was provided by:
Wenzhou City Public Welfare Science and Technology Project of China (Y20170139)
Article History
Received: 12 December 2017
Accepted: 17 July 2018
First Online: 7 August 2018
Ethics approval and consent to participate
: Ethical approval for the clinical trial, was obtained from the Ethics Committee of the 2nd Affiliated Hospital of Wenzhou Medical University (No. 2016–54), and written informed consent was obtained from parent of each child.
: None.
: The authors declare that they have no competing interests.
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