Wang, Huanyan
Shi, Lei
Han, Xuanye
Zhang, Jinchan
Ma, Yuanshuo
Yang, Xi
Liu, Ming
Fan, Lihua
Lou, Fengge
Funding for this research was provided by:
Department Grass-roots Health, National Health and Family Planning Commission of the People’s Republic of China
the National Natural Science Foundation of China (71603066, 71473063)
the Innovative Research Projects of Graduate Students at Harbin Medical University (YJSCX2017-15HYD)
Article History
Received: 25 August 2019
Accepted: 2 December 2019
First Online: 21 December 2019
Ethics approval and consent to participate
: This research project was approved by the Medical Ethics Committee of Harbin Medical University. We obtained approval from the community health centre. We received approval from the community health centre, and also obtained the consent of all participants and signed an informed consent form.
: Not applicable.
: The authors declare that they have no competing interests.