1. UCSF Weill Institute for Neurosciences, Department of Neurology, University of California San Francisco, San Francisco, CA, USA/Department of Physical Therapy and Rehabilitation Science, University of California San Francisco, San Francisco, CA, USA
2. UCSF Weill Institute for Neurosciences, Department of Neurology, University of California San Francisco, San Francisco, CA, USA
3. UCSF Weill Institute for Neurosciences, Department of Neurology, University of California San Francisco, San Francisco, CA, USA/Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
4. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA/Department of Medicine, University of California San Francisco, San Francisco, CA, USA
5. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
6. UCSF Weill Institute for Neurosciences, Department of Neurology, University of California San Francisco, San Francisco, CA, USA/Department of Radiology, University of California San Francisco, San Francisco, CA, USA