Li, Jing
Wang, Jing
Li, Jia-yu
Qian, Sheng
Jia, Rui-xia
Wang, Ying-quan
Liang, Jing-hong
Xu, Yong
Article History
Received: 7 November 2019
Accepted: 27 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: This study obtained ethical approval from the Research Center for Health Care Development of Soochow University. All participants and their parent or guardians were informed about the study and provided verbal informed consent before the study was conducted. Verbal informed consent was approved by the ethics committee.
: Not applicable.
: The authors declare that they have no conflicts of interests.