Funding for this research was provided by:
National Natural Science Foundation of China (81872608)
Beijing Natural Science Foundation Program and Scientific Research Key Program of Beijing Municipal Commission of Education (KZ201710025018)
Received: 10 October 2019
Accepted: 22 April 2020
First Online: 14 May 2020
Ethics approval and consent to participate
: The study was approved in accordance with the requirements of the Ethics Committee of Capital Medical University (2012SY29). Informed consent for the scientific use of biological material was obtained from all patients before enrollment.
: Not applicable.
: The authors declare no competing interests.