Re: Estrogen plus progestin and breast cancer incidence and mortality in the women's health initiative observational study. - Shapiro S; deVilliers TJ; Pines A; Sturdee DW; Archer DF; Baber RJ; Panay N; Farmer RD; Stevenson JC; Mueck AO; Burger HG; Gompel A (Journal of the National Cancer Institute, 2014)