About the Authors
Institute for Dynamic Systems and Control, ETH-Zurich, Zurich, Switzerland
Department of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, California, United States of America
Department of Biomedical Engineering, University of Southern California, Los Angeles, California, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MS RD. Performed the experiments: MS. Analyzed the data: MS FJVC RD. Contributed reagents/materials/analysis tools: MS. Wrote the paper: MS.