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Authors
Ren, Chenchen https://orcid.org/0000-0003-1408-2759
Zhu, Yuanhang
Yang, Li
Zhang, Xiaoan
Liu, Ling https://orcid.org/0000-0002-7490-1712
Ren, Chunying
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Funding
Funding for this research was provided by:
the science and technology department’s major program of Henan, China (161100311100)
the national health and family planning commission in China (201601010)
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