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Vitality of fibroblast cells laser-printed with different wavelengths and pulse durations. The survival rate (A) was determined one hour after printing by counting vital and dead cells stained with Trypan Blue. The vitality after 24 hours was analyzed by measuring the amount of LDH (B) in the cell medium as a measure for dead cells and the transformation of Alamar Blue dye as a measure for the metabolic activity of living and healthy cells after printing.
