[1] UCL, Resp Med, London, England
[2] Ludwig Boltzmann Inst Lung Vasc Res, Resp Med, Graz, Austria
[3] Graz Univ Technol, Inst Comp Graph & Vis, Graz, Austria
[4] Ludwig Boltzmann Inst Clin Forens Imaging, Graz, Austria
[5] Royal Brompton Hosp, Interstitial Lung Dis Unit, London, England
[6] Royal Brompton Hosp, Radiol, London, England
[7] Royal Brompton Hosp, Resp, London, England
[8] Med Univ Graz, A-8036 Graz, Austria