PAK1 and non-small cell lung carcinoma: Interestingly, in NSCLC tissues, PAK1 level was negatively correlated with miR‐615‐5p and positively associated with hsa_circ_0004396 level (Figure S3N,O), implying the relationship of hsa_circ_0004396, miR‐615‐5p, and PAK1 in NSCLC.