Drug use and phylogenetic clustering of hepatitis C virus infection among people who use drugs in Vancouver, Canada: A latent class analysis approach by Jacka, B, Bray, BC, Applegate, TL, Marshall, BDL, Lima, VD, Hayashi, K, DeBeck, K, Raghwani, J, Harrigan, PR, Krajden, M, Montaner, JSG, Grebely, J