1. Department of Biostatistics University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
2. Department of Psychiatry University of Pittsburgh Pittsburgh Pennsylvania USA
3. Department of Epidemiology University of Washington Seattle Washington USA
4. Department of Genetics Stanford University School of Medicine Stanford California USA
5. Division of Public Health Sciences Fred Hutchinson Cancer Center Seattle Washington USA
6. Department of Medicine, Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
7. Department of Genetics University of North Carolina at Chapel Hill Chapel Hill North Carolina USA