5Cook DJ,Kollef MH.Risk factors for ICU-acquired pneumonia,JAMA,1998;279:1605～1606.
6Kollef MH.The prevention of vontilatro-associated pneumonia.N Eng J Med,1999;340:627～634.
7Brochhard L,Mancebo J,Wysocki M,et al.Noninvasive ventilation for acute exacerbations of chronic obstructive pulmonary disease.N Engl J Med,1995;333:817～822.
8Pingleton SK,Fagon JY,Leeper KV Jr.Patient selection for clinical investigation of ventilator-associated pneumonia.Criteria for evaluating diagnostic techniques.Chest,1992;102: 553s～556s.
9Nava S,Ambrosino N,Clini E,et al.Noninvasive mechanical ventilation in the weaning of patients with respiratory failure due to chronic obstructive pulmonary disease.A randomized,controlled trial.Ann Intern Med,1998;128:721～728.
10Plant PK,Elliott MW.Non-invasive ventilation in acute exacerbations of COPD.Q J Med,1998;91:657～660.
