 Now, I don't even know what an epithelial cell is, right? I'm pretty sure I could spell it if I tried. But somebody that knows what is going on here is board-certified invasive cardiologist Dr. Fahmy Farah. And she's been on with us before and is the director of Global Healthline Foundation. Dr. Farah, welcome back. Thank you for having me. It's always a pleasure to be on your show.