SOX2 and laryngotracheoesophageal cleft: The AUC of anti-SOX2 for the diagnosis of LC was 0.587 (95% CI: 0.538–0.636, P < 0.001), the sensitivity was 54.46%, the specificity was only 60.79%, and the cut-off value was 0.550 U/mL (Figure 2(g)).