Phagocyte accumulation on the surfaces of PET disks implanted in human volunteers, precoated with either plasma or serum derived from each volunteer. (A) Myeloperoxidase and non-specific esterase activities were measured on disks explanted after 24 h to reflect the degree of accumulation of PMN and MØ, respectively. (B) The estimated numbers of adherent PMN, MØ, and total phagocytes (PMN+ MØ) were calculated. Vertical lines denote ± 1 Standard Deviation. Significance vs. plasma-coated disks: * p < 0.05.