Funding for this research was provided by:
National Natural Science Foundation of China (81372286, 31671298)
Received: 16 December 2018
Accepted: 22 August 2019
First Online: 30 August 2019
Ethics approval and consent to participate
: Our study was approved by the ethics committee of PLA General Hospital. All treatments were performed in accordance with institutional guidelines and regulations. Clinical data retrieved electronically from the medical records of PLA General Hospital Registry.
: Not applicable.
: The authors have declared no conflicts of interest.