1. From the Department of Health and Human Services, Emotion and Development Branch and Scientific and Statistical Computing Core, NIMH, Bethesda, Md.; the Department of Psychiatry and the Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond; the Department of Psychology, Wellesley College, Wellesley, Mass.; the University of Colorado School of Medicine, Aurora, Colo.; the Department of Medicine, Stanford University, Stanford, Calif.; the Departments of...