Induction of Survival of Motor Neuron (SMN) Protein Deficiency in Spinal Astrocytes by Small Interfering RNA as an In Vitro Model of Spinal Muscular Atrophy oleh Markus Leo, Linda-Isabell Schmitt, Michael Fleischer, Rebecca Steffen, Cora Osswald, Christoph Kleinschnitz, Tim Hagenacker