Reddel Helen K, Toelle Brett G, Marks Guy B, Ware Sandra I, Jenkins Christine R, Woolcock Ann J
Institute of Respiratory Medicine, Royal Prince Alfred Hospital and University of Sydney, PO Box M77, Missenden Road, Camperdown, NSW 2050, Australia.
BMJ. 2002 Jan 19;324(7330):146-7. doi: 10.1136/bmj.324.7330.146.