Su, Mingzhu
Hua, Xingxing
Wang, Jialin
Yao, Nengliang
Zhao, Deli
Liu, Weidong
Zou, Yuewei
Anderson, Roger
Sun, Xiaojie
Funding for this research was provided by:
China Medical Board (CMB 13-160)
Article History
Accepted: 25 October 2018
First Online: 29 October 2018
Compliance with ethical standards
:
: The authors have no conflicts of interest to disclose.
: All procedures performed in this study are in accordance with ethical standards of the Institutional Review Board at School of Public Health of Shandong University (No. 20140201), and with the Declaration of Helsinki.
: Written informed consent was obtained from all participants before data collection.