About the Authors
Department of Pharmacology, University of Iowa, Iowa City, Iowa, United States of America
Department of Biological Sciences, University of Iowa, Iowa City, Iowa, United States of America
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: SS. Performed the experiments: RAM RKD ASD JTC SS. Analyzed the data: RAM RKD ASD JTC SS. Contributed reagents/materials/analysis tools: ASD SHG YMU. Wrote the paper: RAM SS.