From the *Department of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA; †Health Sciences Center–Department of Medicine, Section of Infectious Diseases, Louisiana State University, Baton Rouge, LA; ‡Department of Medicine, University of Mississippi Medical Center, Jackson, MS; and §Baylor College of Medicine, Houston, TX
Conflict of interest: None declared.
Correspondence: Patricia Kissinger, PhD, Department of Epidemiology, School of Public Health and Tropic Medicine, Tulane University, SL-18, 1440 Canal St, New Orleans, LA 70012. E-mail: firstname.lastname@example.org.
Received for publication February 28, 2013, and accepted March 20, 2013.