52
Participants
Start Date
October 31, 2011
Primary Completion Date
September 30, 2014
Study Completion Date
December 31, 2014
Sildenafil
Sildenafil administered orally 3 times per day 20 mg for the first 2 weeks, followed by 3 times 60 mg for 10 weeks
Placebo
Placebo tablets 3 times per day 20 mg foor de first 2 weeks, followed by 3 times 60 mg for 10 weeks
University Medical Center Groningen, Groningen
Collaborators (1)
Pfizer
INDUSTRY
University Medical Center Groningen
OTHER