1. LUHANSK TARAS SHEVCHENKO NATIONAL UNIVERSITY, STAROBILSK, UKRAINE
2. MUNICIPAL ESTABLISHMENT «KHARKIV HUMANITARIAN PEDAGOGICAL ACADEMY» OF KHARKIV, KHARKIV, UKRAINE
3. POLTAVA STATE MEDICAL UNIVERSITY, POLTAVA, UKRAINE
4. POLTAVA V. G. KOROLENKO NATIONAL PEDAGOGICAL UNIVERSITY, POLTAVA, UKRAINE