1. S. Noguchi, Y. Hagiwara, Y. Mizuno, M. Yoshida, H. Yamamoto, I. Nonaka, E. Ozawa, National Institute of Neuroscience, National Center for Neurology and Psychiatry, 4-1-1 Ogawa-higashi cho, Kodaira, Tokyo, 187 Japan.
2. E. M. McNally, C. G. Bönnemann, E. Gussoni, L. M. Kunkel, Division of Genetics and the Howard Hughes Medical Institute, Children's Hospital, Boston, MA 02155, USA.
3. K. Ben Othmane, P. H. Denton, J. M. Vance, Division of Neurology, Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
4. T. Kyriakides and L. Middleton, Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.
5. F. Hentati and M. Ben Hamida, Institute of Neurology, Tunis, Tunisia.