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BACKGROUND Cardiac allograft vasculopathy (CAV) remains the major cause of death after cardiac transplantation during long-term follow-up. Nevertheless, annual angiographic evaluation is difficult to(More)
Trypanosoma cruzi, the agent of Chagas disease, is genetically classified into two major evolutionary lineages, T. cruzi I and T. cruzi II. In Southern American Cone countries it is T cruzi II which(More)
BACKGROUND Arterial systemic hypertension (SH) can be associated with a decrease in endothelium-dependent nitric oxide (NO). Sildenafil increases cyclic guanosine monophosphate (cGMP), a mediator of(More)