Funding for this research was provided by:
National Natural Science Foundation of China (81560713)
Text and Data Mining valid from 2019-03-07
Received: 19 November 2018
Revised: 11 February 2019
Accepted: 15 February 2019
First Online: 7 March 2019
Compliance with ethical standards
: Patient sera were collected in accordance with the code of conduct of research with human material in China. This study was approved by the Ethics Committee at the hospital of Guangxi University for Nationalities. Informed consent was obtained from all participants included in the study.
: The authors declare that they have no conflict of interest.