1. J. F. CadeM.D., Ph.D., F.R.A.C.P., is Director, Intensive Care Unit; D. Hunt, M.D., F.R.A.C.P., F.A.C.C., is Assistant Director, Cardiology Department; and K. P. Stubbs, F.R.A.C.P., is Assistant Haematologist at the Royal Melbourne Hospital, Melbourne. A. S. Gallus, F.R.A.C.P., F.R.C.P.(c), is Staff Specialist, Department of Haematology, Flinders Medical CentreAdelaide.