The Data Coordinating Center (DCC) at Rho, Inc. performs all the statistical and data management for the Treatment of Pulmonary Hypertension and Sickle Cell Disease with Sildenafil Treatment (walk-PHaSST) study. The study has 9 sites in the United States and the UK and is funded by the National Heart, Lung, and Blood Institute (NHLBI), a division of the National Institutes of Health (NIH). For more info...