Decreased expression of EZH2 is associated with upregulation of ER and favorable outcome to tamoxifen in advanced breast cancer. - Reijm EA; Jansen MP; Ruigrok-Ritstier K; van Staveren IL; Look MP; van Gelder ME; Sieuwerts AM; Sleijfer S; Foekens JA; Berns EM (Breast cancer research and treatment, 2011)