CSF2 and COVID-19: Circulating pro-inflammatory cytokines such as interleukin 6 (IL-6), Vascular endothelial growth factor (VEGF), soluble tumour necrosis factor receptor-1 (sTNFR1), granulocyte-macrophage colony-stimulating factor (GM-CSF) and myeloperoxidase (MPO) are different in COVID19 patients.