 I don't know. I don't know. Here's another thing. Parkinson's, these neurological diagnoses are essentially clinical, meaning that you go into the doctor, you talk to the doctor, the doctor observes you, and you get a diagnosis. It's not like, oh, you have heart failure, and it's this level of heart failure based on the blockages in your arteries, which we can scan for. Or you have cancer, and the cancer has spread to your lymph nodes, so it's stage three. However they stage a particular cancer...