Data were collected from 2 different samples. All data were collectedin1999–2000byusingthesamemethods.Bothstudies
1 From the Stanford Prevention Research Center, Stanford University School Of Medicine, Stanford, CA.
2 Supported by grant no. 5-R01 HL54102 from the National Heart, Lung, and Blood Institute; grant no. 99-00530V-10173 from the California Department of Health Services, Cancer Research Program; and a Robert Wood Johnson Foundation Generalist Physician Faculty Scholar Award (to TNR).