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4 Miller MR, "Standardisation of spirometry" 26 : 319-338, 2005
5 Gracchi V, "Spirometry in young children: should computer-animation programs be used during testing?" 21 : 872-875, 2003
6 Enright PL, "Spirometry in the lung health study. 1. Methods and quality control" 143 : 1215-1223, 1991
7 Schwartz J, "Sex and race differences in the development of lung function" 138 : 1415-1421, 1988
8 Trabelsi Y, "Reference values in Tunisian children" 71 : 511-518, 2004
9 Raju PS, "Pulmonary function tests in Indian girls - prediction equations" 71 : 893-897, 2004
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