Platelet recovery following immune-induced thrombocytopenia in Pf4-Cre/FAK-floxed mice. (A) The data represent blood platelet levels measured at various time points following CD41 antibody administration. *P < .05. *P < .01. The numbers represent the mean platelet counts (± SEM) taken from 3 mice for each time point in each group. The data are representative of 2 independent experiments. (B) Levels of Tpo in plasma as determined by ELISA. Data represent mean (± SEM) from 5 mice in each group.