About the Authors

Matthew W. Mitchell

mmitchell@metabolon.com

Affiliation Metabolon, Inc., Durham, NC, United States of America

Competing Interests

The author has the following interest. Matthew W. Mitchell is employed by Metabolon, Inc. There are no patents, products in development or marketed products to declare. This does not alter the author's adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: MWM. Performed the experiments: MWM. Analyzed the data: MWM. Contributed reagents/materials/analysis tools: MWM. Wrote the paper: MWM.