Intensive Care Med (2004) 30:1311–1318

In Tables 4 and 5, symbols and values were incorrectly rendered in the online PDF version and in print. Only in the online HTML version were the tables reproduced correctly. The tables should appear as follows:

Table 4 Time constant of the consecutive volume slices at different PEEP [τ time constant of the total system (respiratory system, endotracheal tube, expiratory ventilator circuit), τ rs time constant of the respiratory system]
Table 5 Total and respiratory system expiratory resistance of the consecutive volume slices at different PEEP [Rtot expiratory resistance of the total system (respiratory system, endotracheal tube, expiratory ventilator circuit), Rrs expiratory resistance of the respiratory system)