University Department of Neurosurgery, Box 167, Block A, Level 4, Addenbrookes Hospital, Cambridge CB2 2QQ, UK Correspondence to: Dr P J Kirkpatrick, University Department of Neurosurgery, Box 167, ...
4 Department of Neurosurgery, Royal Prince Alfred Hospital, Camperdown, Sidney, Australia Correspondence to: Dr Nicholas Higgins Department of Radiology, Box 219, Addenbrooke’s Hospital, Hills Road, ...