I'm so happy with your hopeful attitude about your dad's illness. I make a wish that your expectation can be fulfilled at last. But i think also, that now starts the time when you must spent your time with him. I don't know your circumstances and nothing about your life, not either if you lives with him, of course. I hope then that you understand my words like an expression of my great respect for your lovely careful for your dad. Best wishes and a great smile for both.