1. Divisions of Hospital Medicine; University of California at San Francisco; San Francisco California
2. Division of General Internal Medicine; School of Medicine; Yale University; New Haven Connecticut
3. Divisions of Geriatrics; University of California at San Francisco; San Francisco California
4. San Francisco Veterans Affairs Medical Center; San Francisco California
5. West Haven Veterans Affairs Medical Center; West Haven Connecticut
6. Division of Infectious Diseases; School of Medicine; University of Iowa; Iowa City Iowa