Funding for this research was provided by:
Chinese Government (Health Research & Special Projects Grant of China. (No.201002020))
Article History
Received: 26 October 2018
Accepted: 22 March 2019
First Online: 6 April 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the ethic committee of Peking Union Medical College Hospital (PUMCH, approval number S-K462) and all serum were remains from clinical laboratory.
: Written informed consent was obtained from all participants.