Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Mark R. Keezer and Christina Wolfson and Ronald B. Postuma,"Age, Gender, Comorbidity, and the MDS-UPDRS: Results from a Population-Based Study",Neuroepidemiology,0251-5350,S. Karger AG,2016,46,3,222-227,https://cir.nii.ac.jp/crid/1363107368427360640,https://doi.org/10.1159/000444021