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Authors
Kong, Qingduo
Stavrev, Daniel
Rahimi, Gohar
Todorov, Plamen
Pei, Cheng
Isachenko, Evgenia
Salama, Mahmoud
Skala, Christine
Isachenko, Volodimir
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Funding
Funding for this research was provided by:
Universitätsklinikum Köln
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Article History
Received: 7 July 2025
Accepted: 7 November 2025
First Online: 16 January 2026
Declarations
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: The study was conducted by the Declaration of Helsinki and approved by the Institutional Ethics Committee of Cologne University (applications 999,184 and 13–147) and by the Bulgarian Ethics Committee.
: The authors declare no competing interests.
