aDivision of HIV Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention and Control, Centers for Disease Control and Prevention, Atlanta, GA;

bDivision of Injury Prevention, National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, GA;

cOak Ridge Institute for Science and Education, Oak Ridge, TN; and

dDivision of Overdose Prevention, National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, GA.

Correspondence to: Hannah L. Jackson, PhD, MPH, Division of HIV Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention and Control, Centers for Disease Control and Prevention, 1600 Clifton Road, Mailstop US8-2, Atlanta, GA 30329 (e-mail: [email protected]).

The authors have no funding or conflicts of interest to disclose.

The findings and conclusions in this report are those of the author(s) and do not necessarily represent the official position of the Centers for Disease Control and Prevention.

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