About the Authors
Cognitive Neuroscience Section, National Institute of Neurological Disorder and Stroke, National Institutes of Health, Bethesda, Maryland, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JCD EK JG. Performed the experiments: JCD MT. Analyzed the data: JCD. Contributed reagents/materials/analysis tools: JCD. Wrote the paper: JCD JG.