Kunakbaev, T.
Tanasheva, N. K.
Dyusembaeva, A. N.
Shaimerdenova, K. M.
Sagitzhanov, B. M.
Article History
Received: 21 February 2019
Revised: 4 May 2019
Accepted: 15 May 2019
First Online: 22 April 2020
CONFLICT OF INTEREST
: We declare we do not have any conflicts of interest.