SFTPD and deep vein thrombosis: Injury to the pulmonary region is characterized by elevated expression of surfactant D (sftp-D), increased mucus (muc-1) secretion, and increased expression of eotaxin, which promotes infiltration of granulocytes and mast cells and an increased risk of pulmonary thrombosis as seen in COVID-19 patients (Crouch, 2000; Guo et al., 2001; Prabhakaran et al., 2003; Xie et al., 2017; Chatterjee et al., 2020).