1. Department of Neurology University Medical Center Goettingen Goettingen Germany
2. Paracelsus‐Elena Klinik Kassel Germany
3. Department of Neuropathology University Medical Center Goettingen Goettingen Germany
4. Department of Neurosciences University of California San Diego, San Diego California USA
5. Department of Medical and Molecular Genetics Indiana University School of Medicine Indianapolis, Indiana USA
6. Clinical Neurochemistry Laboratory Sahlgrenska University Hospital Gothenburg Sweden
7. Department of Psychiatry and Neurochemistry Sahlgrenska Academy at the University of Gothenburg Mölndal Sweden
8. Department of Neurodegenerative Disease UCL Institute of Neurology London United Kingdom
9. UK Dementia Research Institute at UCL London United Kingdom
10. Department of Medical Statistics University Medical Center Goettingen Goettingen Germany
11. Biostatistics Biogen, Cambridge Massachusetts USA
12. The Michael J. Fox Foundation for Parkinson's Research New York New York USA
13. Department of Neurology University of Pittsburgh Pittsburgh Pennsylvania USA
14. Department of Biostatistics College of Public Health, University of Iowa Iowa City, Iowa USA
15. Molecular Genetics Section, Laboratory of Neurogenetics National Institute on Aging, National Institutes of Health Bethesda Maryland USA
16. Parkinson's Disease and Movement Disorders Center Northwestern University Feinberg School of Medicine Chicago Illinois USA
17. Department of Neurology Perelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania USA
18. Institute for Neurodegenerative Disorders New Haven Connecticut USA
19. Laboratory of Neuro Imaging University of Southern California, Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of University of Southern California Los Angeles California USA
20. Department of Neurology University of California San Francisco, San Francisco, California, USA, and Parkinson's Disease Research Education and Clinical Center, San Francisco Veterans Affairs Health Care System San Francisco, California USA
21. Clinical Trials Coordination Center, University of Rochester Medical Center Rochester, New York USA
22. Coeruleus Clinical Sciences LLC Woodbridge Connecticut USA
23. Discovery and Early Development Biomarkers Biogen, Cambridge Massachusetts USA