Funding for this research was provided by:
Science and Technology Project of Nantong (MS12016002)
Science and Technology Project from Nantong University (13180083)
Article History
Accepted: 6 May 2019
First Online: 16 May 2019
Compliance with ethical standards
:
: None of the authors has any conflict of interest to disclose.
: The study was approved by the ethics committee of Nantong University.
: All subjects signed informed consent forms before participating.