Merkel cell carcinomas are infiltrated by tumor-associated macrophages that counteract intratumoral CD8 T-cell benefit and correlate with resistence to PD-1 pathway blockade.
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: Merkel cell carcinomas are infiltrated by tumor-associated macrophages that counteract intratumoral CD8 T-cell benefit and correlate with resistence to PD-1 pathway blockade. ### Output: 