Cerebral Venous Sinus Thrombosis in Children with Acute Lymphoblastic Leukemia carrying the MTHFR TT677 Genotype and Further Prothrombotic Risk Factors - Wermes, C; Fleischhack, G; Junker, R; Schobess, R; Schwabe, D; Sykora, K -W; Nowak-Göttl, U (Klinische Pädiatrie, 1999)