SERPINB9 and skin squamous cell carcinoma: The median DNA methylation of SERPINB9 was 58.7% (range 32.5–81.3%) for region 1 and 54.4% (30.0–78.5%) for region 2 in patients with cSCC, and 50.2% (21.8–77.5%) for region 1 and 46.4% (22.1–74.0%) for region 2 in the non-cSCC patients (region 1: p = 0.004; region 2: p = 0.008) [81].