1. Institute of Reproductive and Developmental Biology, Hammersmith Campus, London, United Kingdom
2. Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ospedale Maggiore Policlinico, Department of Neurological Sciences, Stem Cell Laboratory, University of Milan, Italy
3. Department of Anatomy, Brighton and Sussex Medical School, Falmer, Brighton, East Sussex, United Kingdom
4. Department of Paediatrics, Imperial College London, Hammersmith Campus, London, United Kingdom
5. Muscle Cell Biology, Medical Research Council Clinical Sciences Centre, Imperial College London, London, United Kingdom