Dear John, You could contact Mr. Tipu Aziz, Consultant Neurosurgeon, in Radcliff Informary, Oxford. Tel: 44-1865-224549, Fax 44-1865-224898. Regards! ----------------------------------------------------------------------------- Xuguang Liu ~{AuPq9b~} University Lab. of Physiology Tel: 44-(0)1865-272116 Parks Raod Fax: 44-(0)1865-272469 Oxford OX1 3PT, UK Email: [log in to unmask] -----------------------------------------------------------------------------