Institution: | Division of Membrane Biology and Biochemistry, Institute of Cell and Tumor Biology, German Cancer Research Center, Im Neuenheimer Feld 280, D-6900 Heidelberg, Federal Republic of Germany;Department of Pathology, University of Muenster School of Medicine, D-4400 Muenster, Federal Republic of Germany;Department of Surgery, St. Franziskus-Hospital, D-4400 Muenster, Federal Republic of Germany |