When Decrease Aβ1-42 in CSF May Not Mean Alzheimer's Disease: Insights From Two Case Reports With Early Onset Dementia. (October 2018) - Ladeira, Filipa; Cação, Gonçalo; Correia, Ana P.; Pinto, Pedro S.; Cavaco, Sara; Melo-Pires, Manuel; Alonso, Isabel; Taipa, Ricardo