- Radioiodide treatment after sodium iodide symporter gene transfer is a highly effective therapy in neuroendocrine tumor cells. Schipper, M.L., Weber, A., Béhé, M., Göke, R., Joba, W., Schmidt, H., Bert, T., Simon, B., Arnold, R., Heufelder, A.E., Behr, T.M. Cancer Res. (2003)