1. School of Medicine, Pennsylvania State College of Medicine, Hershey, Pennsylvania
2. School of Medicine, American University of Integrative Sciences, St. Michael, Barbados
3. Facultad de Medicina, Universidad Autonoma De Guadalajara, Guadalajara, Mexico
4. University of South Florida, Tampa, Florida
5. Department of Internal Medicine, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania