PGR and breast cancer: We also observed high expression of NK1R‐Tr in ER‐ or PR‐positive patients, which was consistent with previous data.35, 38, 39 Moreover, a Pearson correlation analysis showed a significant negative correlation between miR‐34b/c‐5p and NK1R‐Tr expression in breast cancer patients, which provides further evidence for the regulation of NK1R‐Tr by miR‐34b/c‐5p.