Extracranial non-testicular teratoma in childhood and adolescence: Introduction of a risk score for stratification of therapy - Göbel, Ulrich; Calaminus, Gabriele; Blohm, Martin; Booβ, Dieter; Felberbauer, Franz; Hofmann, Ulrich; Holschneider, Alexander M; Willnow, Ulrich; Harms, Dieter (Klinische Pädiatrie, 1997)