282
Participants
Start Date
March 31, 2007
Primary Completion Date
July 31, 2011
Study Completion Date
July 31, 2012
Placebo
Placebo capsule once a day
Vitamin C
A 500-mg vitamin C capsule once a day
Oregon Health & Science University, Portland
National Heart, Lung, and Blood Institute (NHLBI)
NIH
National Institute of Environmental Health Sciences (NIEHS)
NIH
Oregon Health and Science University
OTHER