Li, Zhong-yi
Chen, Yan-min
Qiu, Li-qian
Chen, Dan-qing
Hu, Chong-gao
Xu, Jian-yun
Zhang, Xiao-hui http://orcid.org/0000-0003-4803-9812
Funding for this research was provided by:
Health and Family Planning Commission of Zhejiang Province (2018268607)
Application of Public Projects in Zhejiang Science and Technology Department (2017C22003)
Article History
Received: 15 June 2018
Accepted: 29 March 2019
First Online: 18 April 2019
Ethics approval and consent to participate
: The Committee for Research Ethics at Zhejiang Provincial Center for Disease Control and Prevention approved the study (number: 2018KY036). All information was confidential.
: All parents or caregivers provided their informed consent to participate in the study.
: The authors declare that they have no competing interests.
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