3Dodek P,Keenan S,Cook D,et al.Evidence based clinical practice guideline for the prevention of ventilator associated pneumonia.Ann Intern Med.2004,141(4):305-313.
4Bullock TK,Waltrip TJ,Price SA,et al.A retrospective study of nosocominl pneumonia in postoperative patients shows a higher mortality rate in patients receiving nasogastric tube feeding.Price Institute of Surgical Research,2004,70(9):822-826.
5Johansson WG.Nosocomial respiratory infections with gram negative bacilli.The significance of the respiratory tract.Ann Intern Med 1972,77(5):701-772.