About the Authors

Weng Kee Wong

Affiliation Department of Biostatistics, University of California, Los Angeles, USA

Ray-Bing Chen

Affiliation Department of Statistics, National Cheng Kung University, Taiwan

Chien-Chih Huang

Affiliation Department of Mathematics, National Taiwan University, Taipei, Taiwan

Weichung Wang

wwang@ntu.edu.tw

Affiliation Institute of Applied Mathematical Sciences, National Taiwan University, Taiwan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WKW RBC CCH WW. Performed the experiments: CCH. Analyzed the data: WKW RBC CCH WW. Wrote the paper: WKW RBC WW.