1. Department of Medicine; National University Hospital; Singapore
2. Department of Medicine and Therapeutics; The Chinese University of Hong Kong; Hong Kong China
3. Inflammation and Infection Research Centre and Prince of Wales' Hospital Clinical School; Faculty of Medicine; University of New South Wales; Kensington New South Wales Australia
4. Department of Respiratory Medicine; Prince of Wales' Hospital; Randwick New South Wales Australia
5. School of Medicine and Public Health; Centre for Asthma and Respiratory Disease; The University of Newcastle; Newcastle New South Wales Australia
6. Department of Respiratory and Sleep Medicine; John Hunter Hospital; Newcastle New South Wales Australia
7. Department of Thoracic Medicine; The Prince Charles Hospital; Brisbane Queensland Australia
8. School of Medicine; The University of Queensland; Brisbane Queensland Australia