1. Department of Clinical Biochemistry, Frenchay Hospital, Bristol BS16 1LE
2. Department of Biochemistry, Southern General Hospital, Govan Road, Glasgow G51 4TF
3. Department of Biochemistry, Southend Hospital, Prittlewell Chase, Westcliff-on-Sea, Essex SS0 0RY
4. Department of Clinical Biochemistry, University Hospital Aintree, Liverpool L9 7AL; Department of Neurobiochemistry, The Walton Centre for Neurology and Neurosurgery, Liverpool L9 7AL
5. Department of Immunology, Northern General Hospital, Shefield S5 7AU
6. Department of Clinical Biochemistry, York Hospital, Wigginton Road, York YO31 8HE
7. Department of Neuroimmunology, National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG
8. Department of Clinical Biochemistry, Victoria Hospital, Fife Area Laboratory, Hayfield Road, Kirkcaldy, Fife KY2 5AG, UK