1. Donetsk National Medical University, Kropyvnytskyi, Ukraine; Sri Manakula Vinayagar Medical College, Pondicherry, India
2. Donetsk National Medical University, Kropyvnytskyi, Ukraine; Al-Azhar University, Gaza, Palestine
3. Kharkiv National Medical University, Kharkiv, Ukraine; Kharkiv Regional Institute of Public Health Services, Kharkiv, Ukraine
4. Kharkiv National Medical University, Kharkiv, Ukraine