Taras Shevchenko National University of Kyiv, Taras Shevchenko National University of Kyiv, Taras Shevchenko National University of Kyiv, Taras Shevchenko National University of Kyiv, Taras Shevchenko National University of Kyiv, Taras Shevchenko National University of Kyiv, affiliation not provided to SSRN, AGH University of Science and Technology and Ivano-Frankivsk National Medical University