1. Department of Epidemiology, Richard M. Fairbanks School of Public HealthIndiana University Indianapolis Indiana
2. Epidemiology Branch, Division of Intramural Population Health Research Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health Bethesda Maryland
3. Department of Clinical and Preventive Nutrition Sciences, School of Health ProfessionsRutgers University Newark New Jersey
4. Glotech Inc. Rockville Maryland
5. Department of Laboratory Medicine and PathologyUniversity of Minnesota Medical School Minneapolis Minnesota