"Apporva Mandavilli: I'm Apporva Mandavilli, from Biomednet news. There is this difference between the U.S. and U.K. as far as regulation, so what's to stop the average patient from just getting on a plane and going to the U.K. and getting the treatment they need? And is there a concern among the scientific community that this is going to set U.S. research back?"