Xu, Hong-qi
Shi, Ji-peng
Shen, Chong
Liu, Yu
Liu, Jing-Min
Zheng, Xiu-yuan
Article History
Received: 19 February 2018
Accepted: 11 November 2018
First Online: 17 December 2018
Compliance with ethical standards
:
: The authors declare that all the experiments of this study complied with the current laws of China in which they were performed. The study was approved by the local ethical committee of the public health school of Nanjing Medical University (NMU) and Jurong Center for Disease Control and Prevention (Jurong CDC) approved the study protocol. Each participant provided informed written consent prior to participation.
: Not applicable.
: None.