Estimating the prevalence of injection drug users in the U.S. and in large U.S. metropolitan areas from 1992 to 2002

Brady JE, Friedman SR, Cooper HLF, Flom PL, Tempalski B, Gostnell K. Estimating the prevalence of injection drug users in the U.S. and in large U.S. metropolitan areas from 1992 to 2002. J Urban Health. 2008; 85(3): 323–51.