1. Department of Neurology, UC Irvine MDA-ALS and Neuromuscular Center, University of California, Irvine, USA
2. RWE Neurology, UCB Pharma, Slough, UK
3. Global Medical, UCB Pharma, Bulle, Switzerland
4. Global Medical and Evidence Generation, UCB Pharma, Bulle, Switzerland
5. Adelphi Real World, Bollington, UK, and
6. Department of Neurology, Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK