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Authors
Butovskaya, Marina L. http://orcid.org/0000-0002-5528-0519
Rostovtseva, Victoria V.
Mezentseva, Anna A.
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Funding
Funding for this research was provided by:
Russian Science Foundation (18-18-00075)
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Article History
Received: 4 October 2021
Accepted: 10 December 2021
First Online: 7 January 2022
Declarations
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: The study was conducted according to the principles of the Declaration of Helsinki. The population studied was illiterate and therefore a written consent could not be obtained. The participants gave verbal consents and were told that their participation was voluntary and that they could withdraw from the study at any time. The study protocol and consent procedure received ethical approval from the Ethics Committee of Moscow State University; research permit was obtained from the Tanzania Commission for Science and Technology (COSTECH) and administration of Ngorongoro Conservation Area (NCA).
: Not applicable.
: The authors declare no competing interests.
