@misc{misc2951bea5,
title   = {Sildenafil effects in metabolic threshold during exercise in patients with heart failure. A randomized study},
author = {Guimarães, Guilherme V. and Bellotti, Giovanni and Martins, Márcia and Bacal, Fernando and Issa, Victor and Bocchi, Edimar},
year = {2002},
booktitle   = {Congresso Brasileiro de Insuficiência Cardíaca}
}