I'd have to break that down into separate parts.
For radioiodine therapy of thyroid cancer and for benign thyroid conditions, I think there will be enough, because these are not conditions that routinely present as emergencies or even as urgent. Much of our use of isotopes is as adjuvant therapy for these patients. If we come to dealing with neuroendocrine tumours, it can be another story, and for the diagnostic side, as you've been hearing, it can be, and probably is right now, at the level of a crisis.