About the Authors
Section of Genetic Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, United States of America
Department of Statistics, University of Chicago, Chicago, Illinois, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: ERG DLN NJC. Performed the experiments: ERG. Analyzed the data: ERG DLN NJC. Contributed reagents/materials/analysis tools: ERG. Wrote the paper: ERG DLN NJC.