Affiliation: | 2. Department of Sociology, George Washington University, Washington, DC;3. Division of Cardiology, Cardiac Rehabilitation and Prevention, James. H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee;4. Department of Biostatistics and Epidemiology, College of Public Health, East Tennessee State University, Johnson City, Tennessee;5. Los Angeles Biomedical Research Institute, Torrance, California |