Comparison of clinical efficacy between letrozole + ribociclib vs. Fulvestrant + letrozole + ribociclib in Hormone receptor positive, HER2 negative metastatic breast cancer - a randomized, phase 2 study (KCSG BR22-20)
Letrozole;Ribociclib;Fulvestrant;Letrozole;Ribociclib
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: Comparison of clinical efficacy between letrozole + ribociclib vs. Fulvestrant + letrozole + ribociclib in Hormone receptor positive, HER2 negative metastatic breast cancer - a randomized, phase 2 study (KCSG BR22-20) ### Output: Letrozole;Ribociclib;Fulvestrant;Letrozole;Ribociclib