619
Participants
Start Date
February 29, 2000
Primary Completion Date
November 30, 2011
Study Completion Date
November 30, 2011
L-selenomethionine
Randomization between active L-selenomethionine and placebo
L-selenomethionine placebo
Randomization between active L-selenomethionine and placebo
National Cancer Institute (NCI)
NIH
Eastern Cooperative Oncology Group
NETWORK
Cancer and Leukemia Group B
NETWORK
SWOG Cancer Research Network
NETWORK