TF and Venous thrombosis: As a major activator of the coagulation cascade (Grover, and Mackman, 2018), several studies have speculated that the induction of tissue factor (TF) might play an important role in the COVID-19-related thrombosis (Bautista-Vargas, et al., 2020; Grover and Mackman, 2018; Mackman, Antoniak, 2020).