Addressing the "risk environment" for injection drug users: the mysterious case of the missing cop.
Burris S, Blankenship KM, Donoghoe M, Sherman S, Vernick JS, Case P, Lazzarini Z, Koester S. Addressing the "risk environment" for injection drug users: the mysterious case of the missing cop. Milbank Q. 2004; 82(1):125-56.