Platelet surface receptor profiles and levels of plasma sGPVI in trauma patients and healthy volunteers. (A) Surface expression of GPVI (i), and levels of sGPVI (ii), in plasma from trauma patients and healthy volunteers. (B-C) Surface expression of GPIb⍺ (B) and GPIIIa (C) on platelets measured by flow cytometry and expressed as geometric mean fluorescence intensity (gMFI). Student t test. **P < .01; ***P < .001.