Complications in Otolaryngology—Head and Neck Surgery DOI: 10.1055/b-002-79381 External Approaches to the Paranasal Sinuses and Skull Base Bernal-Sprekelsen, Manuel; Carrau, Ricardo L.; Dazert, Stefan; Dornhofer, John L.; Peretti, Giorgio; Tewfik, Marc A.; Wormald, Peter-John; Recommend chapter Preview Preview of the content Full Text