Comparative analysis between the HER2 status in primary breast cancer tissue and the detection of isolated tumor cells in the bone marrow. - Schindlbeck,C.; Janni,W.; Shabani,N.; Rack,B.; Gerber,B.; Schmitt,M.; Harbeck,N.; Sommer,H.; Braun,S.; Friese,K. (Breast Cancer Res Treat, 2004)