Lu, J.X.
Pan, H.
Hu, X.Q.
Huang, Z.W.
Zhang, Q.
Funding for this research was provided by:
Chinese State-supporting Technology Project (2008BAI58B02)
Article History
Received: 13 December 2018
Accepted: 21 July 2019
First Online: 2 August 2019
Compliance with ethical standards
: The trial was approved by the ethics committee of the Institute for Nutrition and Food Safety, Chinese Center for Disease Control and Prevention (now renamed the Ethics Committee of the National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention). The investigators explained the benefits and risks of participation in the trial to each participant and their parents. A written informed consent and assent form was signed by each participant’s parents prior to the initiation of the survey.
: The authors declare that they have no conflict of interest.