1 Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia. Electronic address: nicholas.leedman@health.wa.gov.au.
2 Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia; Pleural Medicine Unit, Institute for Respiratory Health, Perth, WA, Australia; School of Medicine, University of Western Australia, Perth, WA, Australia.
3 Department of Anatomical Pathology, Pathwest Laboratory Medicine Western Australia, Nedlands, WA, Australia.