This is excellent. If it works on humans, that they can be fooled with stones, perhaps we can use recycled kidney stones. Some of them are the right size and there is already an industry for recovering them at great expense; they serve no other valuable purpose and using them for this purpose would save the natural environment and ensure that those fooled by the stones are definitively depleted fromt he gene opool. Many values for sucxh a small change. Write your Congressman!!