Trends of Ppl Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/zFO3q47mPG HT @Columbia http://t.co/dbCq0YhKkn

Trends of Ppl Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/2Jkq5WUJip HT @Columbia http://t.co/xy9lr7RkvM

Trends of Ppl Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/JvPP4lSYMB HT @Columbia http://t.co/zvuwaedYmU

Trends of Ppl Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/rB5jDe2ZsF HT @Columbia http://t.co/dbCq0YhKkn

Trends of Ppl Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/pscSpl0Rfw HT @Columbia http://t.co/a245yGE0x6

Trends of Ppl Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/JKYjeZgSer HT @Columbia http://t.co/xy9lr7RkvM

Trends of Ppl Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/23G3cAPp3r HT @Columbia http://t.co/r7HQ0VMw2h

Trends in the Population Prevalence of People Who Inject Drugs in US http://t.co/Md0IY6erfw

New CVAR/CDUHR article- Trends in the Population Prevalence of People Who Inject Drugs in US Metro Areas 1992–2007 http://t.co/tOnywX4uxG

RT @PLOSONE Trends in the Population Prevalence of People Who Inject Drugs in US Metropolitan Areas 1992–2007 http://t.co/iejEmVn0fC

Trends in the Population Prevalence of People Who Inject Drugs in US Metropolitan Areas 1992–2007 http://t.co/wcdhWvnkry