Effects of BM-specific Rps6 hemizygosity on peripheral blood cell counts. Adult (7- to 9-week-old) Tg.MxCre/+ (n = 12) and Rps6^lox/+;Tg.MxCre/+ (n = 16) animals were treated with polyI:C and blood cell counts (± SEM) determined 16 weeks and 38 weeks later. P values refer to a 2-tailed paired t test comparing the 16- and 38-week time points within a genotype, *P < .05; NS indicates not significant; and WBC, white blood cell count.