1. Department of Medicine, Kharkiv National Medical University, 61022 Kharkiv, Ukraine
2. Chiles Center, College of Public Health, University of South Florida, Tampa, FL 33612, USA
3. Department of Internal Medicine, Marshall University, Huntington, WV 25701, USA
4. Department of Biomedical Science, School of Medicine, Tulane University, New Orleans, LA 70112, USA