It is a pleasure to thank Dr. R. Sears and Mr. P. Dean, of the radioisotope department, the London Hospital, for their help, and Professor J. P. Blandy and Professor H. D. Ritchie for much helpful advice. JOHN R. SALAMAN, M.B., B.CHIR., F.R.C.S. Department of Urology, the London Hospital, London E. 1. REFERENCES Antoine, B., Neveu, T., and Ward, P. D. (1969). Transplantation, 8, 98. Atkins, P.,...
