title: Internal consistency of reference equations.
authors: S
authors: S
authors: Verbanck
authors: J
authors: J
authors: Vandevoorde
authors: W
authors: W
authors: Vincken
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012129:Respiratory Function Tests / Q000592:standards*; D018401:Sample Size; D013147:Spirometry / Q000592:standards*