1. University of Rochester; Departments of Neurology and Biostatistics, 265 Crittenden Boulevard, CU 420669 Rochester New York 14642 USA
2. PTC Therapeutics; South Plainfield New Jersey USA
3. Muscular Dystrophy Association; Tucson Arizona USA
4. University of Newcastle upon Tyne, International Centre for Life; Institute of Genetic Medicine, Newcastle upon Tyne UK