Fig.Ā 1From: Influence of endocrine therapy on the ratio of androgen receptor (AR) to estrogen receptor (ER) positive circulating epithelial tumor cells (CETCs) in breast cancerPositive and negative control for AR and ER staining. As positive control we use MCF-7 cell line. MCF-7 cells are positive for EpCAM (green) and AR (red) or ER (red). SW-620 cell line is used as a negative control. SW-620 cells are positive for EpCAM and strictly negative for AR or ERBack to article page