1. Cardiovascular Epidemiology Research Unit, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
2. Department of Environmental Health
3. Department of Epidemiology, and
4. Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts, USA
5. Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands
6. Normative Aging Study, Veterans Affairs Boston Healthcare System, Boston, Massachusetts, USA
7. Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, USA