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Article History

Received: 4 January 2021

Revised: 23 March 2021

Accepted: 8 April 2021

First Online: 19 April 2021

Declarations

:

: Each author certifies that he or she has no commercial associations (e.g., consultancies, stock ownership, equity interest, patent/licensing arrangements, etc.) that might pose a conflict of interest in connection with the submitted article.

: The study was conducted as a retrospective review of the operative data collected at our medical institutions and was performed under the approval of the institutional ethics committees.

: We certify that each author has participated in and has contributed sufficiently to the work to take public responsibility for the appropriateness of the experimental design and method, and the collection, analysis and interpretation of the data and that this final version has been reviewed and approved for submission and/or publication.