1. Department of Emergency Medicine; Division of Infectious Diseases; Vanderbilt University School of Medicine; Nashville TN
2. VA Quality Scholars Program; Geriatric Research Education and Clinical Center; Veterans Affairs Tennessee Valley Healthcare System; Nashville TN
3. Department of Medicine; Division of Infectious Diseases; Vanderbilt University School of Medicine; Nashville TN
4. Department of Preventive Medicine; Division of Infectious Diseases; Vanderbilt University School of Medicine; Nashville TN
5. Department of Biostatistics; Division of Infectious Diseases; Vanderbilt University School of Medicine; Nashville TN
6. Center for Health Research; Kaiser Permanente Northwest; Portland OR