Affiliation: | (1) German Cancer Research Centre, Department of Tumour Progression and Immune Defence, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany e-mail: m.zoeller@dkfz-heidelberg.de Tel.: +49-6221-422454 Fax: +49-6221-424760, DE;(2) Department of Applied Genetics, University of Karlsruhe, Karlsruhe, Germany, DE |