Bedside detection of retained tracheobronchial secretions in patients receiving mechanical ventilation: is it time for tracheal suctioning? - Guglielminotti J; Alzieu M; Maury E; Guidet B; Offenstadt G; Guglielminotti, J; Alzieu, M; Maury, E; Guidet, B; Offenstadt, G (CHEST, 2000)