...- HER2 negative status (based on most recently analyzed biopsy) is defined as immunohistochemistry (IHC) status of 0, 1+ or 2+ (if IHC 2+, a negative FISH test is required, i.e., HER2 fluorescence in situ hybridization (FISH) ratio < 2.0 with an average HER2 copy number <4.0 signals/cell); ER-negative and PR-negative status is defined as ER and PgR <1% nuclei positive by IHC...