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Effect of endotoxin or SOD2 on hMSC-1 proliferation and morphology. (a) Morphology of hMSC-1 cultured for 6, 27, and 45 days in medium containing 0 or 1000 ng/ml endotoxin or 12.8 μg/ml SOD2. (b) Number of hMSC-1 cultured for 45 days in medium containing 0 or 1000 ng/ml endotoxin or 12.8 μg/ml SOD2.
