6,093
Participants
Start Date
November 6, 2001
Primary Completion Date
December 31, 2005
Study Completion Date
April 9, 2020
National Institute for Occupational Safety and Health (NIOSH), Cincinnati
Centers for Disease Control and Prevention
FED
National Institute for Occupational Safety and Health (NIOSH/CDC)
FED
National Cancer Institute (NCI)
NIH