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Immunofluorescence staining of glial fibrillary acidic protein (GFAP) to observe the morphological changes of astrocytes and the expression of GFAP at different time points in the 20 Gy dose group (×320, a, b, c, d, e scale bar = 100 μm). (a) Control, (b) 4 hr after 20 Gy irradiation, (c) 12 hr after 20 Gy irradiation, (d) 24 hr after 20 Gy irradiation, and (e) 48 hr after 20 Gy irradiation
