I'm not aware of that, but I know that all of the studies that are out there have been considered in terms of the assessment that has been done, and it has been determined to be safe.
Again, I think it's important to remember that it is not approved for release into the wild. There are a lot of controls in place to ensure that it doesn't go into the environment, and that includes the fact that it is sterile as well. There are a number of things involved, a number of safeguards in place.