Diphtheria (D) and Tetanus (T) Antibody Values in Children with Acute Lymphoblastic Leukaemia (ALL) after Treatment According to Co-ALL 05/92 - Calaminus, G; Hense, B; Laws, H J; Groeger, M; MacKenzie, C R; Göbel, U (Klinische Pädiatrie, 2007)