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Prasad, L; Spicher, VM; Zwahlen, M; Rickenbach, M; Helbling, B; Negro, F; Swiss, Hepatitis C Cohort Study Group (2007). Cohort Profile: the Swiss Hepatitis C Cohort Study (SCCS). International journal of epidemiology, 36(4), pp. 731-7. Oxford: Oxford University Press 10.1093/ije/dym096