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W1, W2, W3, W4; W-1, W-2, W-3, W-4; C1, C2, C3, C4: 7, 14, 21 and 28 days infected HEK-293 cells by microencapsulated primary porcine hepatocytes, PK-15 cells, HepG2cells’ culture supernatants; PK: PK-15 cell’ culture supernatants; M: 2000 bp Marker
