Funding for this research was provided by:
National Natural Science Foundation of China (81902196)
Received: 5 May 2020
Accepted: 17 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee at Shenzhen People’s Hospital and was conducted in accordance with the Protocol of Helsinki. Informed consent was signed by the relatives of the patients.
: All individual persons consented for their data to be published.
: The authors declare that they have no competing interests.