1. Department of Biostatistics; Boston University School of Public Health; Boston Massachusetts United States of America
2. Department of Biostatistics; Harvard School of Public Health; Boston Massachusetts United States of America
3. Department of Statistics; University of Auckland; Auckland New Zealand
4. Cardiovascular Health Research Unit; Department of Medicine; University of Washington; Seattle Washington United States of America
5. The National Heart; Lung and Blood Institute's Framingham Heart Study; Framingham Massachusetts United States of America
6. Department of Neurology; Boston University School of Medicine; Boston Massachusetts United States of America
7. Division of Endocrinology; Brigham and Women's Hospital and Harvard Medical School; Boston Massachusetts United States of America