The Effect of Sildenafil Citrate (Viagra® (Registered Trademark)) on Brain Blood Flow in Multiple Sclerosis Patients
MR Perfusion Imaging and Hypercapnia (Increased Carbon Dioxide) to Study New Blood Vessel Formation in Multiple Sclerosis
Biomarkers in Multiple Sclerosis
Pharmacokinetics of DMF and the Effects of DMF on Exploratory Biomarkers
† Study has passed its completion date and status has not been verified in more than two years.