Evidence that a wide variety of cancers may use the progesterone induced blocking factor protein to escape immune surveillance as evidenced by significant palliation following treatment with progesterone receptor antagonists in advanced metastatic treatment resistant cancers
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: Evidence that a wide variety of cancers may use the progesterone induced blocking factor protein to escape immune surveillance as evidenced by significant palliation following treatment with progesterone receptor antagonists in advanced metastatic treatment resistant cancers ### Output: 