Natural History in Proximal Spinal Muscular Atrophy
Arch Neurol 52:518-523, Zerres,K.&Rudnik-Schoneborn,R., 1995
Genetic Homogeneity Between Childhood-Onset and Adult-Onset Autosomal Recessive Spinal Muscular Atrophy
Lancet 346:741-742, Brahe,C.,et al, 1995