1. Health Service and Population Research Department, Institute of Psychiatry, King’s College London, London, UK
2. Physiotherapy Department, Maudsley Hospital, South London and Maudsley NHS Foundation Trust, London, UK
3. UPC KU Leuven, Department of Neurosciences, KU Leuven, Kortenberg, Belgium
4. Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
5. Department of Neurosciences, University of Padova, Padova, Italy
6. Geriatrics Section, Department of Medicine, University of Padova, Padova, Italy
7. New York Psychiatric Institute, Columbia University, New York, NY, USA