Fig. 1From: An international reproducibility study validating quantitative determination of ERBB2, ESR1, PGR, and MKI67 mRNA in breast cancer using MammaTyper®Study design. *One site measured additionally a second set of samples 1–8 using a second lot of MammaTyper®. FFPE Formalin-fixed, paraffin-embeddedBack to article page