Dr Marek’s major research interests include identification of biomarkers for early detection, assessment of disease progression and development of new treatments for Parkinson's disease, Alzheimer disease and related neurodegenerative disorders. He has authored numerous neurology and neuroscience publications on these topics. Dr. Marek is the principal investigator of several ongoing multi-center international studies (including the Parkinson Progression Marker Initiative (PPMI) and the Parkinson Associated Risk Syndrome (PARS)) study. Dr. Marek serves as a special scientific advisor to The Michael J. Fox Foundation.