Tracking virus-specific CD4+ T cells during and after acute hepatitis C virus infection. by Lucas, M, Ulsenheimer, A, Pfafferot, K, Heeg, M, Gaudieri, S, Gruner, N, Rauch, A, Gerlach, J, Jung, M, Zachoval, R, Pape, G, Schraut, W, Santantonio, T, Nitschko, H, Obermeier, M, Phillips, R, Scriba, T, Semmo, N, Day, C, Weber, J, Fidler, S, Thimme, R, Haberstroh, A, Baumert, T, Klenerman, P, Diepolder, H