In our integrated analyses, we also revealed other five candidate genes potentially involved in COVID-19, including GADD45G, PGAP2, CSMD1, KNDC1, and STK32C. In the sex-biased DGE analysis, we revealed that the expression of GADD45G and PGAP2 are specifically higher across multiple GTEx tissues of males and females. The gene discussed is PGAP2; the disease is COVID-19.