1. DeBusk College of Osteopathic Medicine, Lincoln Memorial University, 9737 Cogdill Rd, Knoxville, TN 37932, USA
2. Department of Medicine, School of Medicine/John D. Bower School of Population Health, University of Mississippi Medical Center, Jackson, MS 39216, USA
3. School of Medical Sciences, Lincoln Memorial University, 9737 Cogdill Rd, Knoxville, TN 37932, USA