title: Commentary: Aiming for Study Comparability in Parkinson's Disease: Proposal for a Modular Set of Biomarker Assessments to be Used in Longitudinal Studies.
authors.affiliation: Department of Medicine, University of Otago Christchurch, New Zealand.
authors.forename: Yassar
authors.initials: Y
authors.lastname: Alamri
authors.affiliation: Department of Medicine, University of Otago Christchurch, New Zealand.
authors.forename: Michael
authors.initials: M
authors.lastname: MacAskill
authors.affiliation: Department of Medicine, University of Otago Christchurch, New Zealand.
authors.forename: Tim
authors.initials: T
authors.lastname: Anderson
keywords: Parkinson disease; cohort studies; dementia; harmonization; markers