Statistic analysis. Apoptosis rate after four days in culture in collagen sponges (Cs) seeded with different cell concentrations and collagen-I-fibrin gel with different genipin concentrations (G) and control group containing aprotinin. Brackets indicate significant differences assessed by student's t-test (p < 0,05). Error bars: standard deviation of the mean.
Beier et al. BMC Biotechnology 2009 9:34 doi:10.1186/1472-6750-9-34