1. School of Biosciences, University of Exeter, Exeter, United Kingdom
2. European Centre for Environment and Human Health, Peninsula College of Medicine and Dentistry (PCMD), Truro, United Kingdom
3. Laboratory of Epidemiology, Demography, and Biometry and
4. Clinical Research Branch, National Institute on Aging, National Institutes of Health, Department of Health and Human Services, Baltimore, Maryland, USA
5. InCHIANTI Group, Piero Palagi Hospital, Florence, Italy
6. Brixham Environmental Laboratory, AstraZeneca UK Ltd., Devon, United Kingdom
7. Epidemiology and Public Health, Peninsula College of Medicine and Dentistry, University of Exeter, Exeter, United Kingdom