Evolution of natural history and prolongation of overall survival in patients with chronic lymphocytic leukemia: analysis of a long-term follow-up of an unselected cohort in the Hradec Kralove district, Czech Republic.
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: Evolution of natural history and prolongation of overall survival in patients with chronic lymphocytic leukemia: analysis of a long-term follow-up of an unselected cohort in the Hradec Kralove district, Czech Republic. ### Output: 