Funding for this research was provided by:
National Natural Science Foundation of China (81460265)
Received: 12 February 2020
Accepted: 3 June 2020
First Online: 12 June 2020
Ethics approval and consent to participate
: This study has been approved by the ethics committee of Zunyi Medical University. Each patient or the patient’s family was fully informed and signed the informed consent before performing the pre-operative CT examination.
: Not applicable.
: The authors declare that they have no competing interests.