262
Participants
Start Date
November 30, 2005
Primary Completion Date
September 30, 2007
Study Completion Date
September 30, 2007
placebo
daily placebo capsules for 12 months
selenium as L-selenomethionine
daily capsules of 50, 100, or 200 micrograms of L-selenomethionine for 12 months
USDA Grand Forks Human Nutrition Research Center, Grand Forks
National Cancer Institute (NCI)
NIH
USDA Grand Forks Human Nutrition Research Center
FED