1. San Raffaele Telethon Institute for Gene Therapy; Division of Regenerative Medicine, Stem Cells and Gene Therapy, San Raffaele Scientific Institute; Tissue Biology and Gene and Cell Therapy, Vita-Salute San Raffaele University Medical School, Via Olgettina, 58, 20132 Milano, Italy.
2. School of Life Sciences, École Polytechnique Fédérale de Lausanne, SV LVG Station 19, 1015 Lausanne, Switzerland.
3. Laboratory of Genetics, Salk Institute, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.