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2. Definition and incidence of the difficult airway;Benumof,1996
3. Practice guidelines for management of the difficult airway: A report;American Society of Anesthesiologists Task Force on Management of the Difficult Airway;Anesthesiology,1993
4. Committee on Professional Liability-Overview;Cheney;American Society of Anesthesiologists News Letter,1994
5. Definition and incidence of the difficult airway;Benumof,1996