“…Participants tend to patronize programs that are in close geographic proximity (Rockwell, Des Jarlais, Friedman, Perlis, & Paone, 1999). Recent research has shown that innovative methods of syringe collection, such as using drop boxes (Riley et al, 1998), vending machines (Moatti, Vlahov, Feroni, Perrin, & Obadia, 2001), and a variety of venues for exchange, including pharmacy access, are supported both by IDUs and the community (Coffin, 2000;Coffin, Linas, Factor, & Vlahov, 2000;Junge et al, 1999;Riley et al, 2000).…”