ALSFRS-R-SE: an adapted, annotated, and self-explanatory version of the revised amyotrophic lateral sclerosis functional rating scale oleh André Maier, Matthias Boentert, Peter Reilich, Simon Witzel, Susanne Petri, Julian Großkreutz, Moritz Metelmann, Paul Lingor, Isabell Cordts, Johannes Dorst, Daniel Zeller, René Günther, Tim Hagenacker, Torsten Grehl, Susanne Spittel, Joachim Schuster, Albert Ludolph, Thomas Meyer, for the MND-NET consensus group