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Primary hepatocytes before and after serum shock: A After cultured for 4 hours, the hepatocytes adhered, and formed into hepatic cord; B After cultured by medium without serum for 24 hours, hepatocytes extend pseudopodia; C After cultured by medium without serum for 4 days or after serum shock for 3 days, cell-fusion and fibroblastization could be observed.(A × 200;B × 400;C × 400).
