1. Flinders University; Adelaide Australia
2. Queen Elizabeth Hospital; Adelaide Australia
3. The University of Adelaide; School of Medicine; Adelaide Australia
4. Hemel Hempstead Hospital; Thoracic Medicine; Hillfield Road Hemel Hempstead Herts UK HP2 4AD
5. Castle Hill Hospital; Cottingham North Humberside UK HU16 5JQ
6. The Queen Elizabeth Hospital, Central Adelaide Local Health Network; Respiratory Medicine Unit; Adelaide Australia