Institution: | 1. Center for Motor Neuron Biology and Disease, Columbia University, New York, NY 10032, USA;2. Department of Neurology, Columbia University, New York, NY 10032, USA;3. Department of Pathology and Cell Biology, Columbia University, New York, NY 10032, USA;4. Sainsbury Wellcome Centre, University College London, 25 Howland Street, London W1T 4JG, UK |