Seyed Behrooz Mostofi, BSc, MBBS, MS (Orth), FRCS (Orth) is Senior Specialist Registrar in Orthopaedics in South Thames Deanery, UK. He is currently based at William Harvey Hospital, Ashford, Kent, UK. He is also the author of several other books in replacement systems and other areas in Orthopaedics. Two of his titles have been published by Springer: 'Who's Who in Orthopedics' and 'Fracture Classifications in Clinical Practice.' Dr Mostofi has taught the elements of the clinical examination to medical students and doctors taking the FRCS, MRCS and FRCS (Orth) examination over the past few