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Article History

Received: 23 July 2020

Accepted: 13 October 2020

First Online: 22 October 2020

Ethics approval and consent to participate

: All procedures performed in studies involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was reviewed and approved by Ethics Committee of People's Hospital of Xinjiang Uygur Autonomous Region (KY2018031408).Informed written consent (not separate, but included in the preoperative consent) was obtained from all individual participants included in the study. The analysis used anonymous clinical data that were obtained after each patient agreed to treatment by written consent. Access to and use of the medical records described in the study requires the consent of the Ethics Committee of People's Hospital of Xinjiang Uygur Autonomous Region.

: Not applicable.

: The authors declare that they have no competing interests.