All figures, unless otherwise noted, are courtesy of the American Academy of Pediatrics.
Special thanks to Anthony J. Mancini, MD, FAAP, FAAD, Daniel P. Krowchuk, MD, FAAP, J.Thomas Badgett, MD, PhD, FAAP, Anna L.Bruckner, MD, FAAP, FAAD, Fred Ghali, MD, Amy Jo Nopper, MD, FAAP, FAAD, Ingrid Polcari, MD, FAAP, Steven D. Resnick, MD, Michael L. Smith, MD, FAAP, FAAD, Patricia A. Treadwell, MD, FAAP, FAAD.