No, patients lose their perspective on how to gauge durability. Day 0 you have a terrible time with dizziness. After week 1, you have improved greatly. Now, week 2,3,4... How much more is there to improve upon. The problem is how the patients answer questions and how they really don't understand how to explain or describe improvement. Compared to prior week or compared to day 0? From week 3 to 4, there might not be a big improvement, but how does week 4 compare to week 0? It is confusing for 70+ year old patients to figure it out.