NATURAL CTOTOXIC (NC) CELLS AGAINST SOLID TUMORS IN MICE: GENERAL CHARACTERISTICS AND COMPARISON TO NATURAL KILLER (NK) CELLS11Supported by National Institute of Health Grants CA-08748, CA-15988 and CA-17818 and American Cancer Society Grant IM-188. Elizabeth Feo Figarella was supported by a grant from the “Consejo de Desarrollo Cientifico y Humanistico” and the “Centro Nacional de Referenda en Inmunologia Clinica” from the Universidad Central de Venezuela.