1. a Biostatistics Division , Moffitt Cancer Center & Research Institute, University of South Florida , Tampa, Florida, USA
2. b Division of Personalized Nutrition and Medicine , National Center for Toxicological Research, Food and Drug Administration , Jefferson, Arkansas, USA
3. c Biostatistics Center, China Medical University , Taichung, Taiwan
4. d Department of Mechanical Engineering , University of Alabama at Birmingham , Birmingham, Alabama, USA
5. e Department of Molecular Pathology , University of Texas , Houston, Texas, USA
6. f Biostatistics and Bioinformatics Unit , Comprehensive Cancer Center, University of Alabama at Birmingham , Birmingham, Alabama, USA