Would you provide TDM1 or capecitabine for residual disease in HR negative patients with HER2 positivity based on copy number alone?

It is not clear from the question what is meant by "copy number alone." To be HER2 positive by copy number alone is a copy number equal or greater than 6.0 (unless IHC 0 or 1 + with a ratio also < 2.0, in which case the tumor is HER2 negative). If the copy number is between 4 and 6, but the ratio is...