“…Tamoxifen data on decreased contralateral breast cancer incidence (Breast Cancer Trials Committee 1987, CRC Adjuvant Breast Trial Working Party 1988, Fisher et al 1989, Fornander et al 1989, Early Breast Cancer Trialists' Collaborative Group 1992, reduced cholesterol levels (Rossner & Wallgren 1984) associated with lower cardiovascular morbidity and mortality (McDonald & Stewart 1991, Rutqvist & Mattsson 1993, and diminished bone density loss (Love et al 1988, Turken et al 1989, led to proposals (Cuzick et al 1986, Jordan 1990, Love 1990, and later to the initiation in the early 1990s, of tamoxifen breast cancer prevention trials, both in Europe (Powles et al 1989a) and in North America (Fisher 1992). The UK trial confirmed the feasibility of randomly assigning the trial population of women to tamoxifen or control groups (Powles et al 1989b).…”