P4HA1 and head and neck squamous cell carcinoma: The hazard ratio of TXNRD1, ARSI, DHCR7, NUDT11, ARSJ, ASNS, ADA, AGPAT4, FKBP14, P4HA1, and MTHFD2 was larger than 1, suggesting that they were risky genes for HNSCC.