- 2 cohorts
   - 2002-2004 Pre-Policy change 333 people
   - 2006-2008 Post Policy change 376 people
- Used Community outreach and snowball sampling
- 18 years old and injected at least once in the past 3 months before the project started

Ohio State University, Columbus

- The first study of its kind in China, this study focused on Xichang City, in Sichuan Province in SW Chine. 6000,000 people live in the city and its is along many drug trade routes. The people in China have suffered from major drug issues since the economic shift in the 1980s, plus the proximity to the Golden Triangle where much of Asia's opium originates from heroin is the dominant drug of choice in China with 87.6% of drug users abuse it. Currently, its estimated that HIV has spread throughout the country at least intially and still party to do because of Injection Drug use or IDU. Therefore 

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