Fig. 2From: Risky injection practices and HCV awareness in Chiang Mai Province, Thailand: a respondent-driven sampling study of people who inject drugsRecruitment chains by HCV knowledge and screening. Each element represents a participant in the survey. Arrows point from recruiters to recruits. Seeds are represented with bigger elements; orange circles represent participants who had never heard of HCV before the survey; blue squares represent those who had heard of HCV; and green triangles represent those who had already been tested for HCVBack to article page