1. Epidemiology and Public Health Group, University of Exeter Medical School, RILD Level 3, Royal Devon and Exeter Hospital, Exeter, EX2 5DW, UK
2. Genetics of Complex Traits Group, University of Exeter Medical School, RILD Level 3, Royal Devon and Exeter Hospital, Exeter, EX2 5DW, UK
3. School of Public Health, Department of Biostatistics, Boston University, Boston, MA 02215, USA
4. The Framingham Heart Study, Framingham, MA 01702, USA
5. Section of General Internal Medicine, Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA
6. Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, RILD Level 3, Royal Devon and Exeter Hospital, Exeter, EX2 5DW, UK
7. Institut National de la Santé et de la Recherche Médicale (INSERM U1198), 34394 Montpellier, France
8. Ecole Pratique des Hautes études (EPHE), 75014 Paris, France
9. Cambridge Institute of Public Health, School of Clinical Medicine, University of Cambridge, Cambridge, CB2 0SR, UK
10. Center on Aging, University of Connecticut, Farmington, CT 06030, USA
11. National Institute on Aging, Baltimore, MD 21224, USA