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MTT viability of samples cryopreserved in porous pouches in a 2 L mass of alginate beads as a fraction of an unfrozen control. Assessments made immediately post-thaw. Quintiles 2–4 had significantly improved MTT viability compared with the top and bottom quintiles. n = 5 ± SD, significance defined as p < 0.01 using an unpaired Student’s T-test.
