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A chronic obstructive pulmonary disease patient cannot develop an effective cough. Which of the following would you recommend to help this patient generate a more effective cough?
I.enhancing expiratory flow by bending forward at the waist
II.using short, expiratory bursts or the "huffing" method
III.using only moderate (as opposed to full) inspiration
IV.having the patient "tense" the neck muscles while coughing
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