1. Division of General Pediatrics & Adolescent Medicine, Department of Pediatrics, Wake Forest University School of Medicine, Winston-Salem, North Carolina,
2. Burlington Pediatrics, Burlington, Massachusetts
3. Division of Biostatistics, Department of Public Health Science, Wake Forest University School of Medicine, Winston-Salem, North Carolina
4. Division of General Pediatrics & Adolescent Medicine, Department of Pediatrics, Wake Forest University School of Medicine, Winston-Salem, North Carolina
5. Pediatric Research in Office Settings (PROS), Department of Research, American Academy of Pediatrics, Elk Grove Village, Illinois (SF)