1. King's College Hospital; London UK
2. King's College London; London UK
3. Parkinson and Movement Disorders Unit; IRCCS Hospital San Camillo; Venice and University of Padua; Padua Italy
4. Perelman School of Medicine at the University of Pennsylvania; Philadelphia PA USA
5. National Center of Epidemiology and CIBERNED; Carlos III Institute of Health; Madrid Spain
6. King's College Hospital; Princess Royal University Hospital site; Orpington UK
7. University Hospital of Bispebjerg; Copenhagen Denmark
8. County Emergency Clinic Hospital; Faculty of Medicine; Transilvania University Brasov; Brasov Romania
9. Greater Manchester Neuroscience Centre; Manchester UK
10. University of Lund; Lund Sweden
11. University Hospital Reinkenheide; Bremerhaven Germany
12. University Hospital Lewisham; London UK