Vector to transfer the gene for thymidine kinase: Began treating the second group of 15 patients in a Phase I/II trial. A response by at least one of the first

Genetic Therapy Inc. (GTII), Gaithersburg, Md. Product: Vector to transfer the gene for thymidine kinase, HS-tk, into tumor cells, rendering them sensitive to ganciclovir Indication: Operable maligna...