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International forum of allergy & rhinology  (2017)

The International Classification of the radiological Complexity (ICC) of frontal recess and frontal sinus.

Wormald, Peter John; Bassiouni, Ahmed; Callejas, Claudio A; Kennedy, David W; Citardi, Martin J; Smith, Timothy L; Orlandi, Richard R; Kaschke, Oliver; Siow, Jin Keat; Szczygielski, Kornel; Lund, Valerie; Fokkens, Wytske; Psaltis, Alkis J