Queen, that is absolute bullsh**. Seriously, if we were to say the same for "regular" medical problems, seems like most things wouldn't be treated. Let's see... diabetes doesn't "substantially improve", COPD doesn't "substantially improve", many cancers don't "substantially improve", and then there are things like arthritis, bursitis... hm, better be careful, I may be giving insurance companies ideas of other things to not cover because they don't substantially improve with treatment!