Trends in drug consumption and risk of transmission of HIV and hepatitis C virus among injecting drug users in Switzerland, 1993-2006 Dubois-Arber, F and Balthasar, H and Huissoud, T and Zobel, F and Arnaud, S and Samitca, S and Jeannin, A and Schnoz, D and Gervasoni, J P, Eurosurveillance, 13, 18881 (2008), https://doi.org/10.2807/ese.13.21.18881-en