A Novel PSEN1 Mutation in a Patient with Sporadic Early-Onset Alzheimer's Disease and Prominent Cerebellar Ataxia Manuscript Number: 14-0081R1 Author(s): Antonella Antenora, Gian Maria Fabrizi, Moreno Ferrarini, Alessandro Filla, Alessandro Padovani, Sabina Pappata, Silvio Peluso, Cinzia Valeria Russo, Silvia Testi