title: A pediatrician's view. Why do we have paranasal sinuses?
authors.forename: W A
authors.initials: WA
authors.lastname: Altemeier
authors.forename: C
authors.initials: C
authors.lastname: Ward
mesh_terms: D005005:Ethmoid Sinus / Q000276:immunology / Q000502:physiology; D006801:Humans; D008443:Maxillary Sinus / Q000276:immunology / Q000502:physiology; D010256:Paranasal Sinuses / Q000276:immunology / Q000502:physiology*; D012141:Respiratory Tract Infections / Q000276:immunology*