Fig. 1

Linear regressions by exposure of Balb/c 3T3 to CF (A1, A3, A4, and A5) or asbestos (F3) at different concentrations (1.90, 3.80, 7.60, 15.20, 30.40, and 45.70 µg/cm²). The results are expressed as the average number of cell colonies (± SD) of three independent experiments and considered 100% Ctrl.