Reversal of acute exacerbations of chronic obstructive lung disease by inspiratory assistance with a face mask - Brochard,L.; Isabey,D.; Piquet,J.; Amaro,P.; Mancebo,J.; Messadi,A-A.; Brun-Buisson,C.; Rauss,A.; Lemaire,F.; Harf,A. (N Engl J Med, 1990)