1. From the Division of Healthcare Quality Promotion (I.S., N.S., D.S.B.), Epidemic Intelligence Service, Office of Science, Education, and Laboratory Services (I.S.), and Division of Analysis, Research, and Practice Integration, National Center for Injury Prevention and Control (S.R.K.), Centers for Disease Control and Prevention, Atlanta, GA; and Cardiology Division, Emory University School of Medicine, Atlanta, GA (S.R.L.).