1. Thoracic Medicine Program, The Prince Charles Hospital, Brisbane, Australia
2. Pleural Diseases Unit, Department of Internal Medicine, Arnau de Vilanova University Hospital, Biomedical Re search Institute of Lleida, Lleida, Spain
3. Division of Pulmonology, Department of Medicine, Stellenbosch University and Tygerberg Academic Hospital, Cape Town, South Africa
4. Centre for Asthma, Allergy & Respiratory Research, School of Medicine & Pharmacology, University of Western Australia, Perth, Australia