COL1A2 and laryngeal carcinoma: In patients with laryngeal cancers, methylation of p16 and COL1A2 promoters were associated with poor survival (OR = 4.55, 95% CI: 1.36–15.2, p = 0.013 and OR = 3.12, 95% CI: 1.08–8.99, p = 0.035, respectively).