Funding for this research was provided by:
National Science and Technology Major Project of the Ministry of Science and Technology of China
Received: 12 July 2017
Accepted: 22 January 2018
First Online: 1 March 2018
Ethics approval and consent to participate
: The human serum sample used in this study were obtained from Beijing Chest Hospital Sample Bank (Beijing, China), which was approved by the ethics committee of Beijing Chest Hospital, Capital Medical University.
: Not applicable.
: The authors declare that they have no competing interests.