Yes there is still a long way for 520 to go and I am not assuming anything. But, if it pans out and adds meaningfully as part of a combo (be it with kyprolis, pom, or whatever), wouldn't a company have an incentive to utlize it as a combo, as opposed to having a competitor utilize it with a competing drug as part of a superior regimen? Don't understand why there wouldn't be an incentive for the established company to maintain its edge in such a scenario. All hypothetical at this stage, obviously.