title: GOLD or lower limit of normal definition? A letter and authors' response.
authors: Philip
authors: P
authors: Quanjer
authors: Carlos A Vaz
authors: CA
authors: Fragoso
authors: Martin R
authors: MR
authors: Miller
authors: Gülmisal
authors: G
authors: Güder
authors: Stefan
authors: S
authors: Störk
authors: Arno W
authors: AW
authors: Hoes
authors: Frans
authors: F
authors: Rutten
mesh_terms: D003955:Diagnostic Tests, Routine / Q000379:methods* / Q000592:standards*; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000503:physiopathology*; D014797:Vital Capacity / Q000502:physiology*