RT Article T1 Trends in the population prevalence of people who inject drugs in US Metropolitan Areas 1992-2007 JF PLOS ONE VO 8 IS 6 A1 Tempalski, Barbara A2 Friedman, Samuel R. 1942- A2 West, Brooke S. A2 Lansky, Amy L. 1955- A2 Hall, H. Irene A2 Cooper, Hannah L. F. 1970- A2 Brady, Joanne E. A2 Cleland, Charles M. A2 Pouget, Enrique R. LA English YR 2013 UL https://krimdok.uni-tuebingen.de/Record/191272992X DO 10.1371/journal.pone.0064789