Effector Cells of Both Nonhemopoietic and Hemopoietic Origin Are Required for Interferon (IFN)-γ– and Tumor Necrosis Factor (TNF)-α–dependent Host Resistance to the Intracellular Pathogen, <i>Toxoplasma gondii </i>George Yap, Alan Sher|The Journal of Experimental Medicine|1999Cited by 244