9229 POSTER Severe Central Nervous System (CNS) Graft Versus Host Disease (GVHD) in a Patient Without Any Other GvHD Symptoms After Allogeneic Stem Cell Transplantation - Schrader, C.; Stingele, R.; Brück, W.; Metz, I.; Riedel, C.; Schub, N.; Valerius, T.; Deuschl, G.; Gramatzki, M.; Günther, A. (European Journal of Cancer, 2011)