Theoretically there could be because, as I said earlier, it does have the same toxicological risk as uranium, but it would have to be very, very high. I said that the only definitive proof we had about a very dramatic effect on the kidneys was from these accidents and these suicide attempts with uranium. So, sure it's possible. It's been demonstrated. The radiological risk is theoretical. It is plausible, but it has not been demonstrated.
On February 14th, 2013. See this statement in context.