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2. Endoscopic view of a posterior ostium of the ethmoid bulla. Yanagisawa E, Mirante JP, Christmas DA. Ear Nose Throat J; 2008 Aug; 87(8):428. PubMed ID: 18712689 [No Abstract] [Full Text] [Related]
3. The intranasal ethmoidectomy: evolution and an assessment of the procedure. Lawson W. Laryngoscope; 1994 Jun; 104(6 Pt 2):1-49. PubMed ID: 8196464 [No Abstract] [Full Text] [Related]