Impact of mRNA-Assessed Molecular Subtype Conversion, Intact and Apoptotic Circulating Tumor Cells on Survival of Metastatic Breast Cancer Patients: Proof of Principle oleh Stefan Stefanovic, Thomas M. Deutsch, Ralph Wirtz, Andreas Hartkopf, Peter Sinn, Maximilian Kohler, Jan Hofmann, Sanja Bankovic, Katja Vassilev, Marc Sütterlin, Andreas Schneeweiss, Markus Wallwiener