2) Mosmann, T.: Rapid colorimetric assay for cellular growth and survival; Application to proliferation and cytotoxycity assays. J. Immunol. Methods, 65, 55-63, 1983.
3) Lim, F.: Preparation of substances with encap-sulated cells. United States Patent, 4, 409, 331, 1983.
4) Sekiguchi, M., Sakakibara, K., and Fujii, G.: Establishment of cultured cell lines derived from a human gastric carcinoma. Japan J. Exp. Med., 48, 61-68, 1978.