1. Division of Pulmonary and Critical Care Medicine; University of California Irvine School of Medicine; Irvine California
2. Heart Disease Prevention Program, Division of Cardiology; University of California Irvine School of Medicine; Irvine California
3. University of California Los Angeles School of Public Health; Los Angeles California
4. Division of Biostatistics; University of Washington School of Public Health; Seattle Washington
5. Division of Preventive Medicine-Epidemiology; Northwestern University School of Medicine; Chicago Illinois
6. Division of Medicine and Epidemiology; Columbia University; New York New York