About the Authors
- Bin Chen, David J. Wild
- School of Informatics and Computing, Indiana University, Bloomington, Indiana, United States of America
- Ying Ding
- School of Information Science and Library, Indiana University, Bloomington, Indiana, United States of America
The authors have declared that no competing interests exist.
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.