title: [Letter: Surgical methods in chronic frontal sinusitis?].
mesh_terms: D002908:Chronic Disease; D005626:Frontal Sinus / Q000601:surgery*; D006801:Humans; D008722:Methods; D012852:Sinusitis / Q000601:surgery*
vernacular_title: Operative Behandlungsmethoden bei der chronischen Sinusitis frontalis?