The future of gene therapy

Marina Cavazzana-Calvo is at the Immunology and Pediatric Haematology Unit, Hospital Necker, 75743 Paris, Cedex 15, France.

Adrian Thrasher is at the Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK.

Fulvio Mavilio is at the Istituto Scientifico H. San Raffaele, Via Olgettina 58, 20132 Milano, and in the Department of Biomedical Sciences, University of Modena, Via Campi 287, 41100 Modena, Italy.