Yan, Xiaoling
Liu, Yuanli
Cai, Min
Liu, Qinqin
Xie, Xueqin
Rao, Keqin
Article History
Received: 9 December 2021
Accepted: 14 February 2022
First Online: 24 February 2022
Declarations
:
: Ethical approval for these surveys was provided by the Institutional Review Board of the Chinese National Bureau of Statistics. Informed consent was obtained from each respondent before the interview.
: Authors give full consent for publication of this paper in International Journal for Equity in Health.
: The authors declare that they have no competing interests.