Robert Heimer is with the Departments of Epidemiology and Public Health and Pharmacology, Yale University School of Medicine, New Haven, Conn. Lauretta E. Grau and Kaveh Khoshnood are with the Department of Epidemiology and Public Health, Yale University School of Medicine. At the time the study was conducted, Erin Curtin was with the Yale University School of Public Health. Merrill Singer is with the Hispanic Health Council, Hartford, Conn.