EPAS1 and laryngotracheoesophageal cleft: A case-control study of 107 patients with CHB, 83 patients with LC, 234 patients with HCC, and 224 healthy control subjects was carried out, and the HIF-2a rs13419896 and rs6715787 SNPs were genotyped by polymerase chain reaction–restriction fragment length polymorphism (PCR-RFLP).