1. Division of Preventive Medicine, Department of Medicine, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL;
2. Department of Management, Information Systems & Quantitative Methods (MISQ), Collat School of Business, The University of Alabama at Birmingham, Birmingham, AL;
3. Biostatistics Department, Incyte Corporation, Wilmington, DE;
4. Department of Statistics, Virginia Tech., Blacksburg, VA