TF and acute respiratory distress syndrome: TF-positive epithelial MPs with procoagulant activity are released from alveolar epithelial cells stimulated with proinflammatory cytokines in vitro, increased in bronchoalveolar lavage (BAL) fluids collected from patients with ARDS, and are speculated to contribute to fibrin deposition in the air space in the pathophysiology of ARDS [138,139].