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A) Experimental design. B,C) qRT-PCR showing normalized expression levels of vegf, fgf2, sox9 and Col2a1 in cells treated with e-cigAM E (B) and e-cigAM F(C). D,E) Alamar Blue assay showing relative fluorescence after 24 and 72 hours e-cigAM E (B) and e-cigAM F (C) treatment. Asterisks indicate significance.
