early-onset
3.A case control study on 67 patients with late -onset or early-onset depression.
4.Investigation of Excitatory Mechanisms of Early-Onset Seizure Following Acute Cerebral Infarction
7.An African American family with early-onset Alzheimer disease and an APP (T714I) mutation
9.Leigh syndrome is a severe early-onset progressive neurodegenerative disorder due to mitochondrial oxidative phosphorylation defects.

