O'Riordan, J, I; Cain, M, Gawne; Coles, A; Wang, L; Compston, D, AS; Tofts, P; Miller, D, H; O'Riordan, J, I, NMR Research Group, The Institute of Neurology, Queen Square, London WC1N 3BG; Cain, M, Gawne, NMR Research Group, The Institute of Neurology, Queen Square, London WC1N 3BG; Coles, A, Department of Neurology, Addenbrookes Hospital, Hills Road, Cambridge CB2 2QQ, UK; Wang, L, NMR Research Group, The Institute of Neurology, Queen Square, London WC1N 3BG; Compston, D, AS, Department of Neurology, Addenbrookes Hospital, Hills Road, Cambridge CB2 2QQ, UK; Tofts, P, NMR Research Group, The Institute of Neurology, Queen Square, London WC1N 3BG; Miller, D, H, NMR Research Group, The Institute of Neurology, Queen Square, London WC1N 3BG (Sage Publications, 1998)