Male mice from 3 strains of genetically modified mice were used in these studies, with each strain compared with a specific
background control strain: IL - 15Rα — KO (n = 20)(27) and B6129SF2 /
J (B6129)
control (n = 16); IL - 15 — KO (n = 8)(28) and BL / 6NTac
control (n = 8); and HSA - IL - 15TG (n = 7)(34) and HSA - IL - 15Con
control (n = 7).