Affiliation: | P. T. J. Wilson, MB, BS, FRCA, Senior Registrar, Director of Acute Pain Service, Hospitals for Sick Children, Great Ormond Street, London WCIN 3JH.;A. R. Lloyd-Thomas, MB, BS, FRCA, Consultant Anaesthetist, Director of Acute Pain Service, Hospitals for Sick Children, Great Ormond Street, London WCIN 3JH. |