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2. American Red Cross,1973
3. Committee on Accident and Poison Prevention, American Academy of Pediatrics: First aid for the choking child;Pediatrics,1981
4. Differing opinions on the emergency treatment for choking;Day;Pediatrics,1983
5. Choking: the Heimlich abdominal thrust vs back blows: An approach to measurement of inertial and aerodynamic forces;Day;Pediatrics,1982