Primary ciliary dyskinesia patients have the same P. aeruginosa clone in sinuses and lungs.

Competing Interests: Conflict of interest: E. Arndal reports grants from Candys Foundation and Copenhagen University Hospital/Rigshospitalet Fund, during the conduct of the study. Conflict of interest: H.K. Johansen has nothing to disclose. Conflict of interest: J.A.J. Haagensen has nothing to disclose. Conflict of interest: J.A. Bartell has nothing to disclose. Conflict of interest: R.L. Marvig has nothing to disclose. Conflict of interest: M. Alanin has nothing to disclose. Conflict of interest: K. Aanaes has nothing to disclose. Conflict of interest: N. Høiby has nothing to disclose. Conflict of interest: K.G. Nielsen has nothing to disclose. Conflict of interest: V. Backer has nothing to disclose. Conflict of interest: C. von Buchwald has nothing to disclose.