1. Nosocomial respiratory infections with Gram-negative bacilli: the significance of colonization of the respiratory tract;Johanson;Sun Intern Med,1972
2. Incidence, risk, and prognosis factors of nosocomial pneumonia in ventilated patients;Torres;Am Rev Respir Dis,1990
3. Risk factors for pneumonia and fatality in patients receiving continuous mechanical ventilation;Craven;Am Rev Respir Dis,1986
4. Incidence, site, and outcome of infections in patients with the adult respiratory distress syndrome;Seidenfeld;Am Rev Respir Dis,1984
5. Incidence and etiology of pneumonia acquired during mechanical ventilation;Jimenez;Crit Care Med,1989