Affiliation: | (1) Inserm U 393 and CNRS URA 584, Hôpital Necker-Enfants Malades, 149 Rue de Sèvres, 15 Paris Cedex, France;(2) Institute of Medical Genetics, University Hospital of Wales, Heath Park, CF4 4XW Cardiff, UK;(3) Present address: Institute of Molecular Medicine, John Radcliffe Hospital, OX3 9DU Headington, Oxford, UK |