Levels of soluble TM and EPCR in patients with sepsis or SLE. Plasma from patients with sepsis (n = 16) or SLE (n = 42) were assayed for the soluble receptors by ELISA and the means were compared by Student's t-test with receptor levels found in normal plasma (n = 18). *P < .05; **P < .001; ***P < .0001.