AUTHOR=Jelinek George A. TITLE=Determining Causation from Observational Studies: A Challenge for Modern Neuroepidemiology JOURNAL=Frontiers in Neurology VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2017.00265 DOI=10.3389/fneur.2017.00265 ISSN=1664-2295