Funding for this research was provided by:
National Natural Science Foundation of China (81771764, 81501414, 81571594)
National Key Research and Development Program of China Stem Cell and Translational Research (2016YFA0101003)
Received: 10 December 2020
Accepted: 16 March 2021
First Online: 31 March 2021
: All patients enrolled in this retrospective study gave their written informed consent. Furthermore, this study was approved by the Medical Ethics Committee of PUMCH (Beijing, China, Ethics Approval Number: S-K1385).
: Not applicable.
: The authors declare that they have no competing interests.