I think it may vary between cancers like leukemia and lymphoma and relative to glioblastoma. I mean, we know these are just, they have a different metabolic and a different gene signature. Glioblastoma has hundreds, if not thousands, of genetic mutations. You know, so hence the name glioblastoma multiforming, you have all these different cell types and everything. Whereas other types of, like, for leukemia, for example, Gleevec works marvelously well because it's targeting something that's very specific.