Reply to: No Evidence that Glucosylsphingosine Is a Biomarker for Parkinson Disease

Affiliations

• ¹ Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA.
• ² Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
• ³ The Neuro (Montreal Neurological Institute-Hospital), McGill University, Montreal, Quebec, Canada.
• ⁴ Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada.
• ⁵ Department of Human Genetics, McGill University, Montreal, Quebec, Canada.
• ⁶ Nextcea, Inc, Woburn, Massachusetts, USA.
• ⁷ The Michael J. Fox Foundation for Parkinson's Research, New York, NY, USA.
• ⁸ Northwestern University Feinberg School of Medicine, Chicago, IL, USA.