my name is nathan dansky. i have a follow up question and the significance for the program. for example, 40% of people who have hiv and are receiving care are paid for through medicaid program but most of those people only receive that benefit after becoming disabled due to their illness. so i'm wondering to what extent are people who have a preventable disease or treatable disease who have lacked health care driving disability costs whether or not that's a factor? and whether or not health care reform is something that will really address that? i'm wondering how big of a piece of the pie is it? is it large or small? >> i think it's hard to put a number on it. i think it's pretty important. the example you're alluding to is just one example of -- i indicated we get things backwards. we don't figure out what people need so they can continue to work. a couple years later we get them into medicare. and i did a paper on the beneficiaries on their way into ssdi and medicare and how many department have insurance that n that period of time. and at that time, about 15% didn't have