About the Authors
Department of Physiology, Anatomy, and Genetics, University of Oxford, United Kingdom
The authors have declared that no competing interests exist.
OK, FRN, CHP, and AJK conceived, designed, and performed the experiments. OK, FRN, and CHP analyzed the data. AJK contributed reagents/materials/analysis tools. OK, FRN, CHP, and AJK wrote the paper.