1. Department of Internal Medicine, Veteran Affairs Medical Center, Memphis, United States
2. Department of Internal Medicine, University of Tennessee Health Science Center, Memphis, United States
3. University of Tennessee Health Science Center, College of Medicine, Memphis, United States
4. Department of Medicine, Division of Pulmonary, Critical Care & Sleep Medicine, University of Tennessee Health Science Center, Memphis, United States
5. Department of Pharmacy, University of Tennessee Health Science Center, Memphis, United States
6. Department of Medicine, Division of Cardiovascular Diseases, University of Tennessee Health Science Center, Memphis, United States