TNFAIP3 and myocarditis: Histological analysis of heart sections at day 7 revealed that A20 overexpression led to a more improved relief of myocardial inflammation showing few restricted mononuclear inflammation foci and no necrosis when compared to mice with 20 mg/kg AST-IV treatment or plus Ad-LacZ delivery (myocarditis score 1.07 ± 0.06 versus 2.17 ± 0.17, 2.33 ± 0.17, P < 0.05).