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Normalised right lung retention of technicium-99m–sulfur colloid (SC) and indium-111–diethylene triamine penta-acetic acid (DTPA) plotted against time for the a) adult cystic fibrosis (CF) group (n=12), b) paediatric CF group (n=9), c) adult CF group with hypertonic saline treatment (n=11) and d) control group (n=9). Data are presented as mean ± SEM.
