A European prospective study of the natural history of patients with type 2 and 3 spinal muscular atrophy

Revised Hammersmith scale for spinal muscular atrophy: Inter and intra-rater reliability and content validity from a patient perspective D. Ramsey *, M. Scoto , A. Mayhew , G. Ramdharry , A. Wallace , F. Muntoni 1 1 UCL & Great Ormond Street Hospital, Dubowitz Neuromuscular Centre, London, UK; 2 Newcastle University, Institute of Human Genetics, Newcastle, UK; 3 UCL Institute of Neurology, MRC Centre for Neuromuscular Diseases, London, UK