Depression symptoms before the onset of AD are associated with the development of AD, even in families where first depression symptoms occurred more than 25 years before the onset of AD. These data suggest that depression symptoms are a risk factor for later development of AD.

The prevalence of early onset MS (3.6%) in our study confirms the previous findings on early onset MS. A RR course was seen in the majority of cases of early onset MS. A high frequency of relapses, early age at permanent disability, and the presence of malignant cases raise the question of possible early use of disease-modifying therapy in patients with early onset MS.

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