However, one cross-sectional study on 84 patients with PCC symptoms at 1 year showed an inverse relationship between inflammatory cytokines such as CCL11 and time after COVID-19 infection, whereas other markers such as GFAP and myelin oligodendrocyte glycoprotein (MOG) did now show such an association [77]. The gene discussed is MOG; the disease is adrenal gland pheochromocytoma.