1. Laboratory of Epidemiology and Population Sciences; Intramural Research Program; National Institute on Aging; Bethesda Maryland
2. Epidemiology Group; School of Medicine and Dentistry; University of Aberdeen; Aberdeen UK
3. Department of Social Medicine/CAPHRI School for Public Health and Primary Care; Maastricht University; Maastricht the Netherlands
4. Department of Biostatistics; Emory University; Atlanta Georgia
5. Diabetes, Endocrinology, and Obesity Branch; National Institute of Diabetes and Digestive and Kidney Diseases; Bethesda Maryland