[1] Peters LJ.Radiother Oncol,1990;17:177-190 2 Zagars GK et al.Radiother Oncol,1987;8:353-362 3 Spang-Thomsem M et al.Heterogeneity of the in vivo radiosensitivity of human small cell car-cinoma of the lung grown in nude mice.4th World Conference Lung Cancer, Toronto,1985. 4 Maruyama Y et al.Cancer,1985;56:2635 5 Grdina DT et al.Br J Radiol 1978;51:291-301 6 Ando K et al.Int J Radiat Oncol Biol Phys,1985;11:1432 7 Midaner J et al,Int J Radiat Biol 1980;38:237 8 Lesterj Peters et al.Cancer,1985;55:2118-2122 9 Heldey DW et al,J Histochem Cytochem 1983;31:1333-1335 10 Brock C.Br J Cancer,1987;55(suppl):74 11 Russell DH et al.Caner Res,1971;31:1555 12 Sklar MD. Science,1988;239:645-647 13 Samid D et al.Radiat Res,1991;126:244-250 14 Pardo FS et al.Int J Radiat Oncol Biol Phys,1991f21(suppl):148 15 Pirallo KF et al.Int J Radiat Biol,1989;55:783-796 16 Kasid U et al.Science,1989;243:1354 17 Shimm DS et al. Radiat Res,1992;129:149-156 18 Arlett CF et al.Int J Radiat Biol,1988;54:911-928 19 Mckenna WG et al.Radiat Res,1991;125:283-287 20 Iliakis G et al.Cancer Res,1990;50:6575-6579 21 Ling CC et al.Radiat Res,1989;120:267-279 22 Chang EH et al. Science,1987;237:1036-1039.