1. Department of Pediatrics, Dartmouth Medical School, Children's Hospital at Dartmouth, Lebanon, New Hampshire
2. Ann Arbor, Michigan
3. Pediatric Research in Office Settings, Department of Research, American Academy of Pediatrics, Elk Grove Village, Illinois
4. Department of Pediatrics, Vermont College of Medicine, Burlington, Vermont
5. Departments of Biostatistics
6. School of Medicine, Indiana University, Bloomington, Indiana
7. Delaware Valley Pediatric Associates, Lawrenceville, New Jersey
8. Maternal and Child Health, Harvard School of Public Health, Harvard University, Boston, Massachusetts