Sildenafil
Improves Exercise Ability and Hemodynamics
in Patients With Pulmonary Arterial
Hypertension Associated With Connective
Tissue Disease
N Hill1, G Burgess 2,
D Badesch3,
on behalf of the SUPER-1 Study Group
on behalf of the SUPER-1 Study Group
1Tufts New England Medical Center, USA; 2Pfizer Global Research and Development, UK; 3University of Colorado, USA.