Closed Suction System in Tracheal Suctioning in the Critically Ill Patient Connected to Mechanical Ventilation: A Systematic Review Carmen Amaia Ramírez-Torres; Elena Andrade-Gómez; Marta Giménez-Luzuriaga; Carmen Lozano; Esther Sapiña-Beltrán;

Corticosteroids and Severe Community-acquired Pneumonia: New Data, New Questions and a Swinging Pendulum Grant W. Waterer; Mark Metersky;