Fig. 2From: The effect of 2D and 3D cell cultures on treatment response, EMT profile and stem cell features in head and neck cancerHistological evaluation of HNSCC-derived tumor spheroids. a Immunohistochemical staining of HNSCC tumor spheroids with the proliferation marker Ki67 cultured for 1 and 7 days; scale bar = 300 µm. b Quantification of Ki67-positive cells in 1 day and 7 days old tumor spheroids; the data are depicted as mean of ± SD, n = 10. *p < 0.05 according to Student’s testBack to article page