Article History
Received: 9 December 2020
Accepted: 16 December 2020
First Online: 12 January 2021
<!--Emphasis Type='Bold' removed-->Compliance with ethical standards
: The document does not conflict with ethical legislation.
: The authors declare that they have no conflict of interest.
: There are no sensitive data, and no patients were recruited for this study. The authors accept the full transfer of copyright to the journal.
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