Walter Rocca - What we showed is that for the surgery to be...

What we showed is that for the surgery to be a risk factor, it has to be done before menopause. If before age 46 you remove two ovaries, you get a 70 percent increased risk of dementia. And we discovered that women who have only one ovary removed before age 38 -- this is a surgery more often done in younger women -- we see a 260 percent increase in dementia. That is quite a dramatic and somewhat unexpected finding.