Analysis of immune cell phenotypes of BMMNCs in mice injected with WEHI-3B cells expressing exogenous cytokines. BALB/c mice were injected with irradiated WEHI-3B–lacZ, WEHI-3B–GM-CSF, WEHI-3B–GM-CSF plus WEHI-3B–TNF, or WEHI-3B–GM-CSF plus WEHI-3B–IL-4 cells. Seven days later, immune cell phenotypes were assayed by flow cytometry.