Received: 17 October 2019
Accepted: 4 June 2020
First Online: 16 June 2020
Ethics approval and consent to participate
: The study and all the medical records used in the study were approved by the Institutional Review Committee of the Third Affiliated Hospital of Hebei Medical University, China. Informed consent was obtained from all patients who participated in this study. All surgical procedures were in accordance with the relevant surgical principles and guidelines.
: Written informed consent for publication was obtained from all participants.
: The authors declare no conflict of interest.