About the Authors

Hsieh Fushing
Department of Statistics, University of California Davis, Davis, California, United States of America

Corresponding Author

fushing@wald.ucdavis.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HF. Performed the experiments: HF HW CC. Analyzed the data: HF HW CC. Wrote the paper: HF HW CC.