title: [Operation methods: safe, logical and step by step].
authors.forename: D
authors.initials: D
authors.lastname: Simmen
authors.forename: N
authors.initials: N
authors.lastname: Jones
mesh_terms: D004724:Endoscopy / Q000295:instrumentation / Q000379:methods; D006801:Humans; D008128:Logic; D015523:Maxillary Sinusitis / Q000175:diagnosis / Q000601:surgery; D009298:Nasal Polyps / Q000175:diagnosis / Q000601:surgery; D010254:Paranasal Sinus Diseases / Q000175:diagnosis / Q000601:surgery*; D061214:Patient Safety; D014057:Tomography, X-Ray Computed