Cluster 275: fish ihc hybridization situ fluorescence immunohistochemistry negative positive fluorescent breast Cluster 628: receptor er estrogen progesterone pr positive negative breast epidermal growth Cluster 808: tamoxifen aromatase raloxifene inhibitors therapy estrogen selective breast receptor cancer Cluster 916: er pr positive breast cancer negative ihc staining receptor pgr Cluster 1507: receptor estrogen positive progesterone hormone breast cancer negative status tumor Cluster 2093: copy probe signals number average cep ihc ratio ish dual Cluster 2180: receptor negative ihc er pr progesterone estrogen immunohistochemistry hybridization fish