SLC4A4 and neoplasm: The results of marginal model analysis with the Generalized Estimating Equations (GEE) approach indicated that the expression level of SLC4A4 in the tumor tissues is reduced compared to the healthy tissues (Model 1: b = −0.28, p‐value <0.001 and Model 2: b = −0.34, p‐value <0.001).