Systemic Activation of the Immune System during Ganciclovir Treatment Following Intratumoral Herpes Simplex Virus Type 1 Thymidine Kinase Gene Transfer in an Adolescent Ependymoma Patient - Kramm, C M; Korholz, D; Rainov, N G; Niehues, T; Fischer, U; Steffens, S; Frank, S; Banning, U; Horneff, G; Schroten, H; Burdach, S (Neuropediatrics, 2002)