1. Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN, USA
2. Vanderbilt University Medical Center, Nashville, TN, USA
3. Jackson State University School of Public Health, Jackson, MS, USA
4. The Ochsner Clinical School, University of Queensland, Australia
5. Ochsner Medical Center, New Orleans, LA, USA
6. Texas Tech University, El Paso, TX, USA
7. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA