1. Department of Clinical Pharmacology, University Hospital of Lund,
2. Astra Draco, Lund,
3. Lung Pathology Unit, Histopathology, National Heart & Lung Institute, Royal Brompton Hospital, London,
4. Department of Physiology and Neuroscience, University of Lund,
5. Department of Otorhinolaryngology, University Hospital of Lund, Lund, Sweden