Sørensen, P. D.; Andersen, R. F.; Pallisgaard, N.; Madsen, J. S.; Jakobsen, E. H.; Brandslund, I. Quantification of Cell-Free HER-2 DNA in Plasma from Breast Cancer Patients: Sensitivity for Detection of Metastatic Recurrence and Gene Amplification. J Circ Biomark 2015, 4.