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MTT absorbance values (absorption at reference wavelength and blanks subtracted) for up to two weeks of cell culture on different collagen matrix materials. (A,B) Bar charts for bovine collagen scaffolds of 15 mm and 6 mm diameters, respectively. Data of equine and porcine materials is shown in (C,D), respectively. Both (C,D) contain additional measurements of MDS bovine collagen for comparison between the different tests.
