About the Authors

Luke J. Matthews

lmatthews@activatenetworks.net

Affiliation Activate Networks Inc., Newton, Massachusetts, United States of America

Peter DeWan

Affiliation Activate Networks Inc., Newton, Massachusetts, United States of America

Elizabeth Y. Rula

Affiliation Healthways Center for Health Research, Healthways Inc., Franklin, Tennessee, United States of America

Competing Interests

E.Y. Rula is an employee and shareholder of Healthways Inc. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials. P. Dewan and L.J. Matthews are employees and shareholders in Activate Networks, Inc. Activate Networks provides social network mapping and analysis to clients in a variety of industries including healthcare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

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