TPA to dissolve that clot so the FDA just as you mentioned said we have three hours to give it so the approval of the FDA is that we can give it if somebody shows up and we can get it into them within three hours when they come to the ER we have to take a picture of the brain because you can imagine if you have one of those bleeding strokes the worst thing you could do would be to give TPA they're already bleeding in the brain you don't want to give a clot dissolving medicine so it means we got to get a picture of the brain we have to do some