?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Sonnappa&rft.au=Sonnappa%2C+S.&rft.aufirst=S.&rft.date=June+2009&rft.tpages=289&rft.title=Ventilation+inhomogeneity+as+an+indicator+of+airways+disease+in+preschool+children+with+wheeze&rft.inst=UCL+(University+College+London)&rft.degree=Doctoral