Effect of KKO and RTO on platelet counts in vivo. Platelet counts after intraperitoneal injection of KKO or RTO in the FcγRIIA/hPF4⁺ mice are shown. Platelet counts were measured before (basal = time 0) and 4, 24, 48, and 96 hours after antibody injection. Data are mean ± 1 SEM of 5 animals for each condition.