About the Authors

Eric Bair

To whom correspondence should be addressed. E-mail: ebair@stanford.edu

Affiliation Department of Statistics, Stanford University, Palo Alto, California, United States of America

Robert Tibshirani

Affiliation Department of Heath and Research Policy, Stanford University, Palo Alto, California, United States of America

Competing Interests

The authors have declared that no conflicts of interest exist.

Author Contributions

EB and RT conceived and designed the experiments. EB performed the experiments and analyzed the data. EB and RT contributed reagents/materials/analysis tools. EB wrote the paper.