 So there's different modalities to do it. There is heat energy, freezing or the cryo. There is a new technology called PFA, which is pulsed wave. There's some laser stuff that has happened in the past. But irrespective, bottom line is to get rid of the circuits or the triggers for atrial fibrillation. Excellent. We are going to stop right here and take a very quick caller. We have Tom on the line. Tom, you're with Dr. Nisha Tong. Good morning.