46
Participants
Start Date
April 30, 2011
Primary Completion Date
August 31, 2013
Study Completion Date
August 31, 2013
Sildenafil
20 mg three times a day.
Placebo
No active drug
Vanderbilt University, Nashville
Collaborators (1)
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Pfizer
INDUSTRY
Vanderbilt University Medical Center
OTHER