1. The Queen Elizabeth Hospital; Deptartment of Medicine; Woodville Road Adelaide South Australia Australia 5011
2. The Queen Elizabeth Hospital; Adelaide Australia
3. University of Auckland; Department of Medicine; Private Bag 92019 Auckland New Zealand
4. The Queen Elizabeth Hospital; Clinical Epidemiology and Health Outcomes Unit; Adelaide South Australia Australia 5011
5. The Queen Elizabeth Hospital; Department of Medicine; Woodville Road Adelaide South Australia Australia 5011
6. Cochrane Central Executive; Editorial & Methods Department; St Albans House 57-59 Haymarket London UK SW1Y 4QX
7. The Queen Elizabeth Hospital, Central Adelaide Local Health Network; Respiratory Medicine Unit; Adelaide Australia
8. University of Adelaide; C/O Department of Medicine; Adelaide Australia