Yao, Yuan
Shao, Yijun
Zhan, Ming
Zou, Xiaoli
Qu, Weidong
Zhou, Ying
Funding for this research was provided by:
National Science Fund for Distinguished Young Scholars of China (No. 81325017)
Key Program of National Natural Science Foundation of China (No. 81630088)
Scientific Research Foundation of Shanghai Municipal Commission of Health and Family Planning (No. 201540053)
National Natural Science Foundation of China (No. 81373089)
Article History
Received: 28 December 2017
Revised: 28 February 2018
Accepted: 3 April 2018
First Online: 19 April 2018
Compliance with ethical standards
: The study was approved by the Institutional Review Board (IRB) of the School of Public Health, Fudan University (ref: IRB#2013-03-0437). Written informed consent was obtained from all participants and the parents/LAR of the participants.
: The authors declare that they have no conflict of interest.