RESULTS	Similarly , intrinsic subtyping of the metastases provided statistically significant post-relapse survival information with the worst survival outcome in the basal-like [ hazard ratio ( HR ) 3.7 ; 95 % confidence interval ( CI ) 1.3-10 .9 ] and HER2-enriched ( HR 4.4 ; 95 % CI 1.5-12 .8 ) subtypes compared with the luminal A subtype .\