From the *Division of Infectious Diseases, Department of Medicine, School of Medicine, and †Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC
Grant support: R03 MH100987
Conflict of interest: None declared.
Correspondence: William C. Miller, MD, PhD, MPH, Division of Infectious Diseases, University of North Carolina at Chapel Hill, CB#7030, Chapel Hill, NC 27599-7030. E-mail: firstname.lastname@example.org.
Received for publication November 15, 2013, and accepted November 18, 2013.