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Total respiratory resistance (Rrs) [top] and Reactance (Xrs) [bottom] trends as a function of oscillatory frequency (5–35 Hz) in SDU subgroup. Discontinued line (- - -) represent normal ranges adjusted for age and height. Data expressed as a mean ± SE; *p< 0.05 vs reference values of healthy subjects; ^p< 0.05 as a function of frequency. SDU: Unspecified skeletal dysplasias.
