By Duckworth MB ChB BSc MRCSEd MSc, Andrew D., Porter MD FRCSEd (Orth), Daniel, Ralston MD FRCP FMedSci FRSE, Stuart H.
By Colledge BSc FRCP(Ed), Nicki R., Walker BSc MD FRCPE FRSE, Brian R., Ralston MD FRCP FMedSci FRSE, Stuart H.
