About the Authors

Kimberly A. Ingraham

Contributed equally to this work with: Kimberly A. Ingraham, Nicholas P. Fey

Affiliation Center for Bionic Medicine, Rehabilitation Institute of Chicago, Chicago, Illinois, United States of America

Nicholas P. Fey

Contributed equally to this work with: Kimberly A. Ingraham, Nicholas P. Fey

nfey@ricres.org

Affiliations Center for Bionic Medicine, Rehabilitation Institute of Chicago, Chicago, Illinois, United States of America, Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, Illinois, United States of America

Ann M. Simon

Affiliations Center for Bionic Medicine, Rehabilitation Institute of Chicago, Chicago, Illinois, United States of America, Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, Illinois, United States of America

Levi J. Hargrove

Affiliations Center for Bionic Medicine, Rehabilitation Institute of Chicago, Chicago, Illinois, United States of America, Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KAI NPF AMS LJH. Performed the experiments: KAI NPF AMS. Analyzed the data: KAI NPF. Contributed reagents/materials/analysis tools: NPF AMS LJH. Wrote the paper: KAI NPF AMS LJH.