The clinical relevance of circulating tumor cells in correlation to other serum biomarkers (VEGF, HER2, EGFR, TIMP1, CAIX, RASp21) in patients with metastatic breast cancer - Banys-Paluchowski, M; Witzel, I; Riethdorf, S; Pantel, K; Rack, B; Janni, W; Fasching, PA; Aktas, B; Kasimir-Bauer, S; Hartkopf, A; Solomayer, EF; Fehm, T; Müller, V (Geburtshilfe und Frauenheilkunde, 2018)