1. Division of Biostatistics, Department of Preventive MedicineUniversity of Tennessee Health Science Center Memphis Tennessee
2. Department of Biostatistics, Bioinformatics, and BiomathematicsGeorgetown University Medical Center Washington District of Columbia
3. Department de Mathematiques et de StatistiqueUniversite Laval Quebec Quebec Canada
4. Department of Statistics and Actuarial ScienceUniversity of Waterloo Waterloo Ontario Canada
5. Computational and Statistical Genomics Branch, National Human Genome Research InstituteNational Institutes of Health Bethesda Maryland
6. Department of Biostatistics, Human Genetics CenterUniversity of Texas—Houston Houston Texas