FOXP4 and adrenal gland pheochromocytoma: The worldwide branch of COVID-19 HGI, the Long COVID-19 HGI used meta-analysis of GWAS data from patients of 24 studies comprising 16 countries with PCC (n = 6450) patients and control (n = 1,093,995), those who did not develop PCC symptoms), identified a leading SNP rs9367106 (G>C; Chr6: 41,515,652 bp) ~31 kb (30,829 bp) upstream of FOXP4 promoter and ~19 kb (19,393 bp) upstream of rs1886814 that is associated with PCC [13,14].