878
Participants
Start Date
June 30, 2003
Primary Completion Date
July 31, 2010
Study Completion Date
April 30, 2013
Multivitamins
dietary supplement of multivitamins
Selenium
dietary supplement of selenium only
Placebo
placebo pill
Princess Marina Hospital, Gaborone
National Institute on Drug Abuse (NIDA)
NIH
Florida International University
OTHER