title: Comment on: Wollmer P, Engström G. Fixed ratio or lower limit of normal (LLN) as cut-off value for FEV1/VC: An outcome study. Respiratory Medicine (2013) 107, 1460-1462.: Fixed ratio or lower limit of normal (LLN) as cut-off value for FEV1/VC.
authors.affiliation: Yale University School of Medicine, Department of Internal Medicine, New Haven, CT, USA; Veterans Affairs Clinical Epidemiology Research Center, West Haven, CT, USA. Electronic address: carlos.fragoso@yale.edu.
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Vaz Fragoso
authors.affiliation: Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, New South Wales, Australia; School of Medicine and Public Health, University of Newcastle, Newcastle, New South Wales, Australia.
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Pretto
authors.affiliation: Department of Pulmonary Diseases, Erasmus Medical Centre, Erasmus University, Rotterdam, The Netherlands; Department of Paediatrics, Erasmus Medical Centre, Erasmus University, Rotterdam, The Netherlands.
authors.forename: Philip H
authors.initials: PH
authors.lastname: Quanjer
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis*