1. Division of Infectious Diseases, School of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado.
2. Duke University Hospital, Durham, North Carolina.
3. Department of Biostatistics and Bioinformatics, Colorado School of Public Health, Aurora, Colorado.
4. Colorado Antiviral Pharmacology Laboratory, Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-AMC, Aurora, Colorado.