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Addition of Sildenafil to Long-Term Intravenous Epoprostenol Therapy in Patients with Pulmonary Arterial Hypertension: A Randomized Trial
Gérald Simonneau, MD; Lewis J. Rubin, MD; Nazzareno Galiè, MD; Robyn J. Barst, MD; Thomas R. Fleming, PhD; Adaani E. Frost, MD; Peter J. Engel, MD; Mordechai R. Kramer, MD; Gary Burgess, MD; Lorraine Collings, MSc; Nandini Cossons, MD, PhD; Olivier Sitbon, MD; David B. Badesch, MD; PACES Study Group
Annals of Internal Medicine 2008;149:521-530. doi:10.7326/0003-4819-149-8-200810210-00004

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