7Ringback TJ, Viskum K, Lange P, et al. Does long-term oxygen therapy reduce hospitalization in hypoxaemic chronic obstructive pulmonary disease? Eur Respir J, 2002,20 (1) : 38-42.
8Clini E,Sturani C, Rossi A, et al. The Italian muhicentre study on noninvasive ventilation in chronic obstructive pulmonary disease patients. Eur Respir, 2002,20 (3) : 529-538.
9Jansseus JP, Derivaz S, Breiteustein E, et al. Changing patterns in long term noninvasive ventilation. Chest,2003,123( 1 ) :67-79.
10Clinical indicalions for noninvasive positive ventilation in chronic respiratory failure due to reslrictive lung disease, COPD and nocturnal hypoventilation-a consensus conference report. Chest, 1999,116(2) :521-534.
