TACR1 and colonic neoplasm: Further analysis of the associations between NK‐1R expression and clinicopathological characteristics of 50 colon cancer patients revealed a significant correlation between NK‐1R protein expression and tumor site (P = 0.024), tumor grade (P = 0.023), and tumor‐nodes‐metastasis (TNM) stage (P = 0.004) (Table S2, Supporting Information).