Single center observational study of the efficacy of chemotherapy in breast cancer patients treated before and after the widespread use age of CD4/6 inhibitors: Is there evidence that chemotherapy response is impacted by prior use of CD4/6 inhibitors?
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: Single center observational study of the efficacy of chemotherapy in breast cancer patients treated before and after the widespread use age of CD4/6 inhibitors: Is there evidence that chemotherapy response is impacted by prior use of CD4/6 inhibitors? ### Output: 