Pediatric pulmonology in North America--coming of age.
D006801:Humans; D008168:Lung / Q000502:physiology*; D009313:National Health Programs; D009316:National Institutes of Health (U.S.); D009656:North America; D010372:Pediatrics / Q000639:trends*; D010827:Physiology / Q000639:trends*; D012109:Research Support as Topic; D014481:United States