73
Participants
Start Date
August 31, 2011
Primary Completion Date
March 31, 2013
Study Completion Date
March 31, 2013
Tadalafil
20 mg Tadalafil taken once a day for 3 months
Placebo
Placebo tablet taken by mouth once a day for 3 months
Massachusetts General Hospital, Boston
Thomas J. Wang, MD
OTHER