About the Authors
Department of Health Studies, University of Chicago, Chicago, Illinois, United States of America
Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
Departments of Medicine, Statistics, and Human Genetics, University of Chicago, Chicago, Illinois, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: CRK PJR DLN. Analyzed the data: CRK. Contributed reagents/materials/analysis tools: CRK PJR. Wrote the paper: CRK DLN.