Long-term variability of oscillatory impedance in stable obstructive airways disease.

Competing Interests: Conflict of interest: S. Rutting has nothing to disclose. Conflict of interest: T. Badal has nothing to disclose. Conflict of interest: R. Wallis has nothing to disclose. Conflict of interest: R.E. Schoeffel has nothing to disclose. Conflict of interest: N. Roche has nothing to disclose. Conflict of interest: A.M. Cottee has nothing to disclose. Conflict of interest: D.G. Chapman has nothing to disclose. Conflict of interest: M. Greenwood has nothing to disclose. Conflict of interest: C.S. Farah has nothing to disclose. Conflict of interest: G.G. King has received consultancy fees for talks, chairmanship, advisory boards and conference sponsorship/attendance from AstraZeneca, Boehringer Ingelheim, Chiesi, GlaxoSmithKline, Menarini, MundiPharma and Novartis; unrestricted research grants from NHMRC, Boehringer Ingelheim, CycloPharma, GlaxoSmithKline, Menarini, MundiPharma and philanthropic individuals and societies; non-financial support and other (research collaboration) from Restech, Italy during the conduct of the study. Conflict of interest: C. Thamrin has a patent WO 2006130922 A1 issued, which is broadly relevant to the work; and has intellectual property arrangements with Thorasys Medical Systems and Restech srl relating to research collaborations, but does not have any financial relationships with either company.