Validation of different techniques for the diagnosis of ventilator-associated pneumonia. Comparison with immediate postmortem pulmonary biopsy - Torres,A.; El-Ebiary,M.; Padro,L.; Gonzales,J.; De La Bellacasa,J.P.; Ramirez,J.; Xaubet,A.; Ferrer,M.; Rodriguez-Roisin,R. (Am J Respir Crit Care Med, 1994)