1. Department of Human Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
2. Centre for Genomic and Experimental Medicine, Institute of Genetics & Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XU, UK
3. Department of Twin Research and Genetic Epidemiology, Kings College London, London SE1 7EH, UK
4. Department of Biomedical Sciences, Chang Gung University, Taoyuan, Taiwan
5. Genomic Medicine Research Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan
6. Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
7. Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA 70112, USA
8. Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
9. Longitudinal Studies Section, Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
10. Center for Population Epigenetics, Robert H. Lurie Comprehensive Cancer Center and Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
11. Laboratory of Environmental Epigenetics, Departments of Environmental Health Sciences Epidemiology, Columbia University Mailman School of Public Health, New York, NY 10032, USA
12. Departments of Genetics, Biostatistics, Computer Science, University of North Carolina, Chapel Hill, NC 27599, USA
13. Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, Edinburgh EH8 9JZ, UK
14. Department of Psychology, University of Edinburgh, Edinburgh EH8 9JZ, UK
15. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, USA
16. Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
17. VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
18. Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
19. Children’s Minnesota Research Institute, Children’s Hospitals and Clinics of Minnesota, Minneapolis, MN 55404, USA
20. Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, USA
21. Center of Development and Aging, New Jersey Medical School, Rutgers State University of New Jersey, Newark, NJ 07103, USA
22. Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Didcot, Oxfordshire OX11 0RQ, UK
23. Department of Biostatistics, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA 90095, USA