1. the Department of Medicine and the Department of Epidemiology and Preventive Medicine at the University of Maryland School of Medicine in Baltimore
2. director of the Center for Primary Care Research and acting director of the Center for Outcomes and Effectiveness Research at the Agency for Health Care Policy and Research in Rockville, Maryland
3. The Center for the Assessment and Management of Change in Academic Medicine at the Association of American Medical Colleges in Washington, D.C.
4. The Department of Epidemiology and Preventive Medicine