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Normal development of the liver in TNF−/−relA−/− mice. (A) TNF+/+relA−/− 14.5-dpc embryo. No viable hepatocytes can be seen. (B) TNF−/−relA−/− 14.5-dpc embryo. (C) TNF−/−relA−/− newborn mouse. (D) TNF−/−relA+/+ newborn mouse. Sections are hematoxylin/eosin-stained. (×400.)
