Author contribution: Vakunenkova OA — experimental study; Ivnitsky JuJu — rationale, developing the experimental model, data interpretation and discussion; Gaykova ON — morphometry data interpretation; Kozlov AA — morphometry studies; Schäfer TV — experimental procedure, data processing and visualization, developing the experimental model. All authors contributed to discussion, manuscript writing and editing.

Compliance with ethical standards: the study was carried out in accordance with the principles of bioethics, approved by the European Convention for the Protection of Vertebrate Animals used for Experimental and Other Scientific Purposes.