aDepartment of Neuropsychiatry, Royal Melbourne Hospital

bDepartment of Psychiatry, University of Melbourne, Parkville, VIC, Australia

cAlzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC location VUmc

dAmsterdam Neuroscience, Neurodegeneration, Amsterdam, The Netherlands

Correspondence to Samantha M. Loi, Neuropsychiatry, Royal Melbourne Hospital, Grattan Street, Parkville, VIC 3050, Australia. Tel: +61 3 9342 8750; e-mail: [email protected]