Funding for this research was provided by:
National Natural Science Foundation of China (51602053)
Natural Science Foundation of Fujian Province (2019J01300)
Text and Data Mining valid from 2019-06-03
Received: 10 March 2019
Revised: 24 April 2019
Accepted: 9 May 2019
First Online: 3 June 2019
Compliance with ethical standards
: The study was approved by the Ethics Committee of Fujian Medical University. The human fluid samples used in this study do not have any identifying information about the participants, who provided written informed consent.
: The authors declare that they have no competing interests.