1. Hospital Medicine Section, Medicine Specialty Service, Durham VA Medical Center , Durham, North Carolina , USA
2. Department of Physician Assistant Studies, The George Washington University School of Medicine and Health Sciences , Washington D.C. , USA
3. Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus , Aurora, Colorado , USA
4. Division of Infectious Diseases, Department of Medicine, Duke University School of Medicine , Durham, North Carolina , USA