Nitrite or sildenafil, but not BAY 41-2272, blunt acute pulmonary embolism-induced increases in circulating matrix metalloproteinase-9 and oxidative stress - Dias-Júnior, Carlos A.; Cau, Stefany B. A.; Oliveira, Alisson M.; Castro, Michele M.; Montenegro, Marcelo F.; Gerlach, Raquel Fernanda; Tanus-Santos, José Eduardo (Thrombosis Research, 2009)