Medical Progress

From the School of Medicine and Pharmacology (B.W.S.R., R.A.L.), the Department of Respiratory Medicine (B.W.S.R.), and the Western Australian Institute for Medical Research (B.W.S.R., R.A.L.), Sir Charles Gairdner Hospital, Nedlands, Perth, Australia. Address reprint requests to Dr. Robinson at the School of Medicine and Pharmacology, 4th Fl., G Block, Sir Charles Gairdner Hospital, University of Western Australia, Nedlands, Perth 6009, Australia, or at [email protected].