Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Brutsche, M H; Grossmann, P; Müller, R E; Wiegand, J; Pello, (Clown); Baty, F; Ruch, Willibald (2008). Impact of laughter on air trapping in severe chronic obstructive lung disease. Int. J. Chron. Obstruct. Pulmon. Dis., 3(1):185-192.