Li, Lei
Sun, Meijun
Sun, Jianping
Kong, Hangru
Zhong, Wenwen
Wang, Hong
Funding for this research was provided by:
Nestlé Foundation
Article History
Received: 21 May 2019
Accepted: 21 August 2019
First Online: 5 September 2019
Compliance with Ethical Standards
:
: The authors declare no conflict of interest.
: The study was conducted in accordance with the ethical standards of Institutional Review Committee of Public Health School of Xiamen University and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all participants included in the study.