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Table 2 New-Castle Ottawa Scale Ratings

From: Needle exchange programs for the prevention of hepatitis C virus infection in people who inject drugs: a systematic review with meta-analysis

Study Selection Comparability Exposure/Outcome
Hagan 1995 [40]
Hagan 2004 [41]
Holtzman 2009 [42]
Patrick 2001 [43]
Roy 2007 [44]
Todd 2015 [45]