1. Risk factors for pneumonia and fatality in patients receiving continuous mechanical ventilation;Graven;Am Rev Respir Dis,1986
2. Infection control and pneumonia prophylaxis strategies in the intensive care unit;Flaherty;Semin Respir Infect,1990
3. Nosocomial respiratory infection;Pennington,1985
4. Risk factors for postoperative pneumonia;Garibaldi;Am J Med,1981
5. Nosocomial pneumonia: a multivariate analysis of risk and prognosis;Celis;Chest,1988