21,860
Participants
Start Date
March 31, 2005
Study Completion Date
February 28, 2009
counseling intervention
fecal occult blood test
screening colonoscopy
Harvard Medical School, Boston
Harvard Pilgrim Health Care, Boston
Harvard Vanguard Medical Associates - Kenmore, Boston
Harvard Medical School (HMS and HSDM)
OTHER
National Cancer Institute (NCI)
NIH