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Authors
Zharkinbekova, N. A.
Ormanov, N. Zh.
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Article History
Received: 12 June 2019
Revised: 24 June 2019
Accepted: 1 July 2019
First Online: 11 December 2019
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of Interest.</i> The authors declare that they have no conflict of interest.
: <i>Ethical approval.</i> All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee.
: <i>Informed consent.</i> Informed consent was obtained from all individual participants included in the study.
