 You have fungus associated with the trees, the tree roots, and they kind of a symbiotic relationship, right? Did the cancer and these bad bacteria that chew up the chemo create a symbiosis, right? And what was the kind of initial event for that? We don't know. But the idea that at some point there were bacteria that were selected to grow around the cancer that like the tree roots of pancreatic cancer, and in so doing, actually facilitate the cancer's growth, is really an area that we're trying to better understand. This can happen in other tumor types as well.