1. Service de Neurologie, CRMR Atrophie Multisystématisée CHU Bordeaux Bordeaux France
2. Univ. de Bordeaux CNRS, IMN, UMR 5293 Bordeaux F‐33000 France
3. CNRS, IMN, UMR 5293 Bordeaux F‐33000 France
4. Dept. Medicine University of Otago, Christchurch, and New Zealand Brain Research Institute Christchurch New Zealand
5. Service de Neurologie, CRMR Atrophie Multisystématisée CHU Toulouse, Toulouse– INSERM U 1048 Institut des Maladies Métaboliques et Cardiovasculaires Toulouse France
6. INSERM U897, Public Health and Development Institute (ISPED) Bordeaux University Bordeaux France
7. AFFiRiS AG Vienna Austria
8. Clinical Investigation Center CIC1436, French Reference Centre for MSA University Hospital Toulouse, University Toulouse France
9. ToNIC, Toulouse NeuroImaging Center Université de Toulouse Toulouse France
10. Institute of Neuroradiology University Magna Graecia Catanzaro Italy
11. Study Center PROSENEX Ambulatorium Betriebs GesmbH at Confraternität‐Privatklinik Vienna Austria
12. Department of Neurology Medical University of Innsbruck Innsbruck Austria
13. Université de Toulouse 3, CHU de Toulouse, INSERM, Centre de Reference AMS, Service de Neurologie et de Pharmacologie Clinique Centre d'Investigation Clinique CIC1436, Réseau NS‐Park/FCRIN et Centre of Excellence for Neurodegenerative Disorders (COEN) de Toulouse Toulouse France