1. Ross University School of Medicine, Bridgetown, BB11093, Barbados
2. The University of Arizona, College of Medicine – Phoenix, Phoenix, Arizona, AZ85004; Grand Canyon University, The Colangelo College of Business, Phoenix, Arizona, AZ85017, United States
3. Ivano-Frankivsk National Medical University, Halytska str., 2, Ivano-Frankivsk, 76000, Ukraine
4. Midwestern University, Arizona College of Osteopathic Medicine, Glendale, Arizona, AZ85308, United States