The Leeds West Research Ethics Committee gave ethical approval, and the investigation conformed to the principles outlined in the Declaration of Helsinki <a href=https://cial.cfd>cheap cialis online canadian pharmacy</a> Layout table for study information Study Type Interventional Clinical Trial Actual Enrollment 5187 participants Allocation Randomized Intervention Model Parallel Assignment Masking Triple Participant, Investigator, Outcomes Assessor Primary Purpose Treatment Official Title A Phase III Randomized Double Blind Study of Letrozole Versus Placebo in Women With Primary Breast Cancer Completing Five or More Years of Adjuvant Tamoxifen Actual Study Start Date August 24, 1998 Actual Primary Completion Date August 22, 2003 Actual Study Completion Date October 2003