Peripheral blood profile of gp130^Y757F/Y757F (F/F) mice and gp130^+/+ (wild-type) littermates. Platelet counts (A), hematocrit (B), white blood cell (WBC) counts (C), and WBC differentials (D). Data from 5 mice of each genotype are expressed as the mean ± SD. ^*P < .05 versus data from gp130^+/+ mice. N indicates neutrophils; L, lymphocytes; M, monocytes; and E, eosinophils.