1. Department of Medicine, David Geffen School of Medicine at the University of California, Los Angeles, CA
2. Department of Medicine, VA Greater Los Angeles Healthcare System, Los Angeles, CA
3. VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, CA
4. School of Medicine, Johns Hopkins University, Baltimore, MD
5. Department of Medicine, University of Utah, Salt Lake City, UT
6. Department of Medicine, University of Michigan, Ann Arbor, MI
7. Department of Medicine, Columbia University, New York City, NY
8. Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
9. University of Illinois at Chicago, Chicago, IL
10. Lewis Katz School of Medicine, Temple University, Philadelphia, PA
11. Department of Medicine, University of California, San Francisco, CA
12. School of Medicine, Wayne State University, Detroit, MI