lare was a recent study in ncet, in england, suggesting a decline in age-specific prevalence of dementia, quite a large decline. before we would want to take that and put that into a forecast, we would want to have more examples of that from a wider range of populations. right now, i think, at least from our perspective, we do not see any change in age-specific prevalence. >> we have been generally using the word alzheimer's, and you have been using the word dementia. is there a distinction to be drawn here? >> yes. our study was about dementia, because that is what our data would support. seven-diagnoses -- sub-diagnoses of alzheimer's, but we did not have enough data to distant which those. this is somewhat outside my area expertise. the majority of dementia is alzheimer's, but typically there will be vascular dementia. at the same time. >> should we expect an related to these ?opics let's we're looking at long-term and the role of health insurance why we don't have a long-term health insurance market. it is clear that this should be an enjoyable situation, but we don't have a well fun