Detection of cytokeratin (CK) 18 positive cells in the bone marrow (BM) of breast cancer patients - no prediction of bad outcome. - Untch,M.; Kahlert,S.; Funke,I.; Boettcher,B.; Konecny,G.; Nestle-Kraemling,C.; Bauernfeind,I. (Proc ASCO, 1999)