Fig. 6
From: Exposure to 3G mobile phone signals does not affect the biological features of brain tumor cells
Tumorigenicity assays for human glioma cells. Tumorigenicity assays in nude mice (a–b). Tumor formation could be detected in all groups. c The expression of Ki-67 in tumors of different groups was measured by immunostaining. d Tumor weights in different groups. e Ki-67-positive cells were quantified by capturing an average of 10 random fields in the slices. Data represent means ± SD from three independent experiments