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Authors
Zhou, Yang
Chen, Cheng
Jiang, Hui
Pan, Hong-Qiu
Zhu, Li-Mei
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Funding
Funding for this research was provided by:
Bill and Melinda Gates Foundation (51914)
the Health Reseach fund of Jiangsu provincial commission of health and family planning (Z201505)
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Article History
Received: 28 February 2018
Accepted: 9 January 2019
First Online: 18 January 2019
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki, and the protocol was approved by the Ethics Committee of the Chinese Centers for Disease Control and Prevention (Reference number not appropriate). This study used only routine data and did not involve any human participation; therefore, the application for waiving informed consent was accepted by the Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
