950593 EYO estimated years to symptom onset 21 950591 EYO egg yolk oil 6 950587 EYO expected symptom onset 6 950589 EYO Estimated years of Disease 1 950594 EYO estimated years to clinical symptom onset 1 950592 EYO estimated years to onset of dementia 1 950590 EYO Exercise Your Options 1 950588 EYO EYO CDs 1