| Affiliation: | 1. San Francisco Coordinating Center, California Pacific Medical Center Research Institute, , San Francisco, California;2. Aging and Population Health Laboratory, Department of Biomedical Physiology and Kinesiology, Simon Fraser University, , Burnaby, British Columbia, Canada;3. Department of Epidemiology, University of Pittsburgh, , Pittsburgh, Pennsylvania;4. Department of Family and Preventive Medicine, University of California at San Diego, , San Diego, California;5. Division of Health Policy and Management, Park Nicollet Institute for Research and Education, School of Public Health, University of Minnesota, , Minneapolis, Minnesota |
