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Authors
Han, Zhiying
Li, Jing
Sun, Guomei
Gu, Kaikan
Zhang, Yangyi
Yao, Hui
Jiang, Yuan
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Funding
Funding for this research was provided by:
Public Health research Project of Science and Technology Committee of Jing'an District, Shanghai (2020GW01, 2020GW01)
National Key Research and Development Program of China (2017YFD0500301, 2017YFD0500301)
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Article History
Received: 8 November 2020
Accepted: 20 August 2021
First Online: 29 October 2021
Declarations
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: The study protocol was approved by the Ethical Review Committee at the Shanghai CDC (2014-1). All the participants in this study provided informed consent before they were interviewed in their household or the community health center/clinics. An investigation team including at least one local community health worker and one CDC staff conducted the investigation. All investigations and methods were carried out in accordance with Shanghai CDC guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.
