_:vb50946529 . _:vb50946529 . _:vb50946529 . _:vb50946529 . _:vb50946529 "A motor neuron disease that has material_basis_in some inheritance and affects muscle, bone, and the nervous system."^^ . _:vb50946529 "url:https://n.neurology.org/content/85/8/658"^^ .