About the Authors
- Xin Shuai, Johan Bollen
- School of Informatics and Computing, Indiana University, Bloomington, Indiana, United States of America
- Alberto Pepe
- Center for Astrophysics, Harvard University, Cambridge, Massachusetts, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: XS AP JB. Performed the experiments: XS AP JB. Analyzed the data: XS AP JB. Contributed reagents/materials/analysis tools: XS AP JB. Wrote the paper: XS AP JB.