1. Dipartimento di Bioscienze, Università degli Studi di Milano, Milan, Italy.
2. INGM, Istituto Nazionale Genetica Molecolare, Milan, Italy.
3. WT-MRC Cambridge Stem Cell Institute and Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK.
4. Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110, USA.
5. Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA.
6. Center of Regenerative Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
7. Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Milan, Italy.
8. CHDI Management/CHDI Foundation, New York, NY, USA.