Comparison of HER2 status between primary tumor and disseminated tumor cells in primary breast cancer patients. - Solomayer,E.F.; Becker,S.; Pergola-Becker,G.; Bachmann,R.; Kramer,B.; Vogel,U.; Neubauer,H.; Wallwiener,D.; Huober,J.; Fehm,T.N. (Breast Cancer Res Treat, 2006)