Claus M Schlotter1, Ulf Vogt2, Heike Allgayer3 and Burkhard Brandt4 
1
Department of Obstetrics and Gynecology, Breast Centre Klinikum Lüdenscheid, Academic Teaching Hospital of the University Bonn, Luedenscheid, Paulmannshoeher Str. 14 – 58515 Luedenscheid Germany
2
European Laboratory Association, Ibbenbueren, Roggenkampstr. 12 49477 Ibbenbueren Germany
3
Department of Experimental Surgery and Molecular Oncology, Faculty Mannheim, University Heidelberg, Molecular of Solid Tumors, German Cancer Research Center (DKFZ), Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim Germany
4
Institute for Tumor Biology, University Medical Center Hamburg-Eppendorf, Campus Forschung N 27 Martinistraße 52, 20246 Hamburg, Germany