Incidence of viral markers and evaluation of the estimated risk in the Swiss blood donor population from 1996 to 2003 Niederhauser, C and Schneider, P and Fopp, M and Ruefer, A and Lévy, G, Eurosurveillance, 10, 518 (2005), https://doi.org/10.2807/esm.10.02.00518-en