P 328. Novel Homozygous Variants Confirm SPTBN4-Related Congenital Myopathy and Expand the Clinical Phenotype - Buelow, Markus; Süßmut, David; Köhler, Jutta; Gill, Esther; Smith, Laurie D.; Schuelke, Markus; Knierim, Ellen (Neuropediatrics, 2018)