The RRs for ER + /PR + , ER + /PR − , and ER − /PR −  tumours were 1.46 (95% CI 1.12–1.91) for > 35 g/day, 1.13 (95% CI 0.73–1.77) for 20 g/day, and 1.21 (95% CI 0.79–1.84) for above 20 g/day, respectively [9]. This evidence concerns the gene PGR and neoplasm.