Tagaev, T., Vityala, Y., Zhumabekova, A., Parihar, Y., & Narasimharaj, A. (2021). Coronavirus disease 2019: ethical and epidemiological issues with clinical trials. European Journal of Clinical and Experimental Medicine, 19(2), 197–199. https://doi.org/10.15584/ejcem.2021.2.14