About the Authors

Bin Chen

Affiliation School of Informatics and Computing, Indiana University, Bloomington, Indiana, United States of America

Ying Ding

Affiliation School of Information Science and Library, Indiana University, Bloomington, Indiana, United States of America

David J. Wild

djwild@indiana.edu

Affiliation School of Informatics and Computing, Indiana University, Bloomington, Indiana, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BC YD DJW. Performed the experiments: BC. Analyzed the data: BC. Contributed reagents/materials/analysis tools: BD YD DJW. Wrote the paper: BC DJW.