Vickie M Mays1, Susan D Cochran1. 1. Vickie M. Mays is with the Department of Psychology, University of California Los Angeles, and the Department of Health Policy and Management, UCLA Fielding School of Public Health, Los Angeles, CA. Susan D. Cochran is with the Department of Epidemiology, UCLA Fielding School of Public Health and the Department of Statistics, University of California Los Angeles.