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Authors
Zienkiewicz, Tadeusz http://orcid.org/0000-0002-6941-6309
Klatka, Maria http://orcid.org/0000-0002-2743-8139
Zienkiewicz, Ewa http://orcid.org/0000-0002-1430-3358
Klatka, Janusz http://orcid.org/0000-0002-3805-4640
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Article History
Received: 27 June 2021
Accepted: 6 April 2022
First Online: 27 April 2022
Declarations
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: Ethics approval was not required for this study. Statistical data were obtained from publicly available databases. All methods were performed in accordance with relevant guidelines and regulations applicable to data used from publicly available public sources (statistical databases).
: Not applicable.
: The authors declare that they have no competing interests.
