Lopes A.A., Barreto A.C., Maeda N.Y., ícero C., Soares R.P.S., Bydlowski S.P., Rich S..  2011.  Plasma von Willebrand factor as a predictor of survival in pulmonary arterial hypertension associated with congenital heart disease. Brazilian Journal of Medical and Biological Research. 44(12):1269-1275.