1. National Institutes of Health (NIH) Clinical Center, Bethesda, MD
2. AP‐HP, Hôpital Broca, Service de Gérontologie I, and Université Paris Descartes, Sorbonne Paris cité, Paris, France
3. The Icelandic Heart Association, Kopavogur, Iceland
4. University of Iceland, Reykjavik, Iceland
5. National Heart Lung and Blood Institute, NIH, Bethesda, MD
6. Laboratory of Epidemiology, Demography, and Biometry, Intramural Research Program, National Institute on Aging, NIH, Bethesda, MD