Funding for this research was provided by:
Medical Scientific Research Foundation of Guangdong Province, China (A2013336)
Text and Data Mining valid from 2018-06-15
Received: 8 August 2017
Accepted: 1 June 2018
First Online: 15 June 2018
: Xiaomei Dong is an Associate Professor at Jinan University, Guangzhou, China (PhD). Xiongfei Chen and Lin Peng are public health doctors (MA). Jianwei Yang, Minhui Pang, Jiayi Zhang, Zhan Zhang, Jiaming Rao and Haiqing Wang are postgraduate students at Jinan University, Guangzhou, China.
: All procedures were approved by the Ethical Committee of the Guangzhou Centers for Disease Control and Prevention. Prior to the survey, the healthcare providers who participated in the study were introduced to the objectives of the study by the research team and signed the informed consent.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.