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Regional distribution of the patients with HCV recruited in this study. Twenty-eight hospitals were divided territorially into North, Northeast, Southwest, South, Central, Northwest and East China. There were 92 HCV-infected patients in North China, 91 in Southwest China, 104 in South China, 224 in Central China, 162 in Northwest China, 252 in East China and 89 in Northeast China. HCV, hepatitis C virus.
