An observational study to evaluate RAS mutations in circulating tumor DNA after standard chemotherapies for metastatic colorectal cancer patients with tumors harboring RAS mutation: RASMEX study (JACCRO CC-17).
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: An observational study to evaluate RAS mutations in circulating tumor DNA after standard chemotherapies for metastatic colorectal cancer patients with tumors harboring RAS mutation: RASMEX study (JACCRO CC-17). ### Output: 