1. Environmental and Occupational Medicine and Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA
2. Population Oral Health, Faculty of Dentistry, University of Sydney, Sydney, New South Wales, Australia
3. Rush Institute for Healthy Aging, Rush University Medical Center, Chicago, Illinois, USA
4. Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA
5. The Normative Aging Study, Veterans Affairs Boston Healthcare System, Boston, Massachusetts, USA
6. Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, USA
7. Department of Health Policy and Health Services Research, Henry M. Goldman School of Dental Medicine, Boston University, Boston, Massachusetts, USA
8. Department of Environmental Health Sciences, University of Michigan School of Public Health and Medicine, Ann Arbor, Michigan, USA