AUTHOR=Crouse Jacob J. , Moustafa Ahmed A. TITLE=A commentary on: “A 12-year population-based study of freezing of gait in Parkinson's disease” JOURNAL=Frontiers in Aging Neuroscience VOLUME=7 YEAR=2015 URL=https://www.frontiersin.org/journals/aging-neuroscience/articles/10.3389/fnagi.2015.00106 DOI=10.3389/fnagi.2015.00106 ISSN=1663-4365