1. Department of Medicine, Infectious Diseases Division, University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, USA;
2. Department of Medicine, Infectious Diseases Division, Veterans Administration Western New York Healthcare System, Buffalo, NY, USA;
3. Laboratory for Antimicrobial Pharmacodynamics, University at Buffalo School of Pharmacy and Pharmaceutical Sciences, Buffalo, NY, USA;
4. Department of Pharmacy, Veterans Administration Western New York Healthcare System, Buffalo, NY, USA