Multimodal treatment of malignant sacrococcygeal germ cell tumors: a prospective analysis of 66 patients of the German cooperative protocols MAKEI 83/86 and 89. - Göbel,U.; Schneider,D.T.; Calaminus,G.; Jürgens,H.; Spaar,H.J.; Sternschulte,W. (J Clin Oncol, 2001)