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Article History

Received: 5 December 2020

Accepted: 23 February 2021

First Online: 8 March 2021

Declarations

:

: This is a retrospective analysis of a small group of patients, and the ethics committee approval was not asked, as indicated by Article 9 EU GDPR “Processing of special categories of personal data” Paragraph 1 (j), and Article 89 EU GDPR “Safeguards and derogations relating to processing for archiving purposes in the public interest, scientific or historical research purposes or statistical purposes.”

: Individual personal data are not directly published in the manuscript and, in order to guarantee and respect individual privacy, data do not suggest any recognition of patients.

: The authors declare that they have no competing interests.