After confirming that RNA‐containing exosomes are enriched in EBCs of LC patients (Fig EV2D and E, and Appendix Supplementary Results), we tested whether increased Em/Ad expression ratios of GATA6 and NKX2‐1 can also be detected in EBCs. The gene discussed is NKX2-1; the disease is laryngotracheoesophageal cleft.