Drug Diary: Each day of the first 8 weeks you take IL-2 and each day during extended-duration IL-2 (if applicable); you will be asked to document in a drug diary when you took the drug and where you injected it. The diary will also ask if the entire syringe was injected, and if there were other issues related to IL-2. You will be asked to return your drug diary to clinic every 2 weeks for the first 8 weeks of IL-2 and at least every 8 weeks for extended duration IL-2.