Wang, Ziyue
Jiang, Weixi
Liu, Yuhong
Zhang, Lijie
Zhu, Anna
Tang, Shenglan
Liu, Xiaoyun
Funding for this research was provided by:
Bill & Melinda Gates Foundation
Article History
Received: 9 May 2019
Accepted: 20 September 2019
First Online: 12 November 2019
Ethics approval and consent to participate
: Ethics approval was obtained from Duke Kunshan University and from Peking University Health Science Center. Respondents who agreed to participate in the study signed an informed written consent form.
: Not applicable.
: The authors declare that they have no competing interests.