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Authors
Ospanov, Oral https://orcid.org/0000-0002-1840-114X
Akilzhanova, Ainur
Buchwald, J. N.
Fursov, Alexandr
Bekmurzinova, Farida
Rakhimova, Saule
Yeleuov, Galymzhan
Kozhamkulov, Ulan
Abdina, Zhanar
Fursov, Roman
Jumayeva, Lyudmila
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Article History
Received: 31 October 2020
Revised: 22 April 2021
Accepted: 27 April 2021
First Online: 8 May 2021
Declarations
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: The funder had no role in the study design, data collection, data analysis, data interpretation, or writing of the manuscript.
: The study was conducted in accordance with the ethical standards of the 1964 Helsinki Declaration and its later amendments and with the approval of the regional ethics committee of Astana, Kazakhstan. The ethics committee of the Corporate Fund University Medical Center (UMC) has granted ethics approval for this study (May 24, 2018, approval 5).
: Informed consent was obtained from all participants.
: The authors declare no competing interests.
