title: Interlaboratory variability in the determination of estrogen receptor and progesterone receptor content in human breast tumors: quality control in Switzerland.
mesh_terms: D001943:Breast Neoplasms / Q000032:analysis*; D003600:Cytosol / Q000032:analysis; D004054:Diethylstilbestrol; D005260:Female; D006801:Humans; D007753:Laboratories / Q000592:standards; D011397:Promegestone; D011786:Quality Control; D011960:Receptors, Estrogen / Q000032:analysis*; D011980:Receptors, Progesterone / Q000032:analysis*; D013557:Switzerland
chemical_list: D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D004054:Diethylstilbestrol; D011397:Promegestone