1. Department of Philosophy and Center for Neurotechnology, University of Washington, Seattle, WA, USA
2. Department of Physical Medicine and Rehabilitation and Department of Biomedical Engineering and Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI, USA
3. Center for Sensorimotor Neural Engineering and Department of Philosophy, University of Washington, Seattle, WA, USA
4. Department of Neurology, Oregon Health and Science University, Portland, OR, USA