PI3K/AKT/mTOR pathway and CDK4/6 inhibitors efficiently inhibit cell growth of HPV-positive and HPV-negative head and neck squamous cell carcinoma in vitro
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: PI3K/AKT/mTOR pathway and CDK4/6 inhibitors efficiently inhibit cell growth of HPV-positive and HPV-negative head and neck squamous cell carcinoma in vitro ### Output: 