IFNA17 and neoplasm: The tumor sizes were measured on day 32 (7 days after the last injection) as shown in Figure 4(b), and the tumors from the IFNα-AF-MSC group (n = 15) were 434.99 ± 165.79 mm3 significantly smaller than those from the untreated group (653.89 ± 227.84 mm3) (P < 0.05).