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PURPOSE The effect of growth hormone (GH) treatment on exercise tolerance in children with cystic fibrosis was investigated. METHODS 10 prepubertal children (mean +/- SD; age: 12.1 +/- 1.7 yr; height: 137.4 +/- 9.2 cm; body mass: 27.8 +/- 4.2 kg; forced expiratory volume in 1 s (FEV1): 68 +/- 22% predicted) were randomly assigned to either control period(More)