 Think about that. I mean, obviously, if you just got a hip implant and you laid in your bed for the rest of your life, you would never need anything. But you can't do that. We don't do that. That's not the activities of daily living. So you must look at your job. Do you have an office job, a labor job? How does it affect you standing? How does it affect your motion? How does it affect your range of motion? How does it affect you in doing that? And you need to know those answers.