From the Harcourt House Sheffield, UK, Harcourt Crescent, Sheffield S10 1DG (CEU), Glenfield Hospital, Leicester, UK (FCJ)

Correspondence to Chika Edward Uzoigwe, MRCS, Harcourt House Sheffield, Harcourt Crescent, Sheffield S10 1DG, UK. Tel: +44 7527907618; e-mail: [email protected]