HER2 immunohistochemistry (IHC) expression in HER2-positive (HER2-pos) metastatic breast cancer (mBC): clinical and prognostic differences between IHC 2+ and IHC 3+ populations.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: Identify all the mentioned drugs in the given text. Text may or may not contain drug. If they contain more than 1 drug, use ";" as delimiter and join them. ### Input: HER2 immunohistochemistry (IHC) expression in HER2-positive (HER2-pos) metastatic breast cancer (mBC): clinical and prognostic differences between IHC 2+ and IHC 3+ populations. ### Output: 