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(a) The mononuclear cells were separated from UCB by density gradient centrifugation. (b) Recovery of viable TNC (after thawing): the viable TNC recovery of group C was higher than that of either groups A, B (P < 0.05) or group D (P < 0.01). The recovery of group D was lower than that of either group A, B, or C (P < 0.01). Scale bars: 5 μm.
