title: Open letter: the need to change the method for defining mild airway obstruction.
authors.forename: Philip H
authors.initials: PH
authors.lastname: Quanjer
authors.forename: Paul L
authors.initials: PL
authors.lastname: Enright
authors.forename: Martin R
authors.initials: MR
authors.lastname: Miller
authors.forename: Janet
authors.initials: J
authors.lastname: Stocks
authors.forename: Gregg
authors.initials: G
authors.lastname: Ruppel
authors.forename: Maureen P
authors.initials: MP
authors.lastname: Swanney
authors.forename: Robert O
authors.initials: RO
authors.lastname: Crapo
authors.forename: Ole F
authors.initials: OF
authors.lastname: Pedersen
authors.forename: Emanuela
authors.initials: E
authors.lastname: Falaschetti
authors.forename: Jan P
authors.initials: JP
authors.lastname: Schouten
mesh_terms: D000367:Age Factors; D000402:Airway Obstruction / Q000175:diagnosis*; D005541:Forced Expiratory Volume; D006801:Humans; D008875:Middle Aged; D017410:Practice Guidelines as Topic / Q000592:standards; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis; D012016:Reference Values; D014797:Vital Capacity