1. American Board of Internal Medicine Philadelphia Pennsylvania USA
2. Department of Family and Community Medicine, College of Osteopathic Medicine Michigan State University East Lansing Michigan USA
3. Division of Geriatrics University of Wisconsin Madison Wisconsin USA
4. Division of Geriatrics and Gerontology Wm. S. Middleton Veterans Affairs Geriatric Research Education and Clinical Center Madison Wisconsin USA
5. Division of Geriatrics University of California, San Francisco San Francisco California USA
6. Division of Geriatric Medicine Thomas Jefferson University Philadelphia Pennsylvania USA
7. Division of Geriatric Medicine Johns Hopkins University School of Medicine Baltimore Maryland USA