1. Department of Biostatistics Vanderbilt University Nashville Tennessee
2. Department of Mathematics, Statistics, and Computer Science University of Illinois at Chicago Chicago
3. Department of Statistics University of Auckland Auckland New Zealand
4. Department of Emergency Medicine Vanderbilt University Medical Center Nashville Tennessee
5. Department of Biomedical Informatics Vanderbilt University Medical Center Nashville Tennessee
6. Department of Pediatrics Vanderbilt University Medical Center Nashville Tennessee
7. Biostatistics Unit Kaiser Permanente Washington Health Research Institute Seattle Washington