1. Division of Infectious Diseases, Department of Medicine, Northport VA Medical Center , Northport, New York , USA
2. Section of Geriatrics, Department of Internal Medicine, Yale School of Medicine , New Haven, Connecticut , USA
3. AIDS Program, Section of Infectious Diseases, Department of Internal Medicine, Yale School of Medicine , New Haven, Connecticut , USA
4. AIDS Program , , New Haven, Connecticut , USA
5. Section of Infectious Diseases, Department of Internal Medicine, Yale School of Medicine , , New Haven, Connecticut , USA