@misc{miscf8cc4625,
title   = {The effect of sildenafil in the multimeric composition of plasma von Willebrand factor in pulmonary hypertension: preliminary study},
author = {Carvalho, J. H. and Lopes, A. A. and Nascimento, N. M. and Soares, R. P. S. and Bydlowski, Sérgio Paulo and Maeda, N. Y.},
year = {2007},
booktitle   = {Simpósio avanços em pesquisas médicas}
}