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"GOLD or lower limit of normal definition? a comparison with expert-based diagnosis of chronic obstructive pulmonary disease in a prospective cohort-study"

Gülmisal Güder, Susanne Brenner, Christiane E Angermann, Georg Ertl, Matthias Held, Alfred P Sachs, Jan-Willem Lammers, Pieter Zanen, Arno W Hoes, Stefan Störk and Frans H Rutten*

Respiratory Research 2012, 13:13  doi:10.1186/1465-9921-13-13