1. Division of Infectious Diseases, Department of Medicine, University at Buffalo, State University of New York, Room 107, Research Building (20), VA Medical Center, 3495 Bailey Ave, Buffalo, NY 14215, USA.
2. VA Western New York Healthcare System, Buffalo, NY, USA
3. Division of Pulmonary, Critical Care & Sleep Medicine, Department of Medicine, University at Buffalo, State University of New York, NY, USA