Cao, Hui
Yan, Shuangqin
Gu, Chunli
Wang, Sumei
Ni, Lingling
Tao, Huihui
Shao, Ting
Xu, Yeqing
Tao, Fangbiao
Funding for this research was provided by:
the second batch of Anhui provincial health office research projects (13FR006)
National Natuural Science Fundation of China (81573168)
Article History
Received: 24 November 2016
Accepted: 29 January 2018
First Online: 19 February 2018
Ethics approval and consent to participate
: The project was approved by Biomedicine Ethical Committee in Anhui Medical University. Informed consent obtained from all the participating caregivers of children was written.
: Not applicable
: The authors declare that they have no competing interests.
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