D90A-SOD1 mediated amyotrophic lateral sclerosis : a single founder for all cases with evidence for a Cis-acting disease modifier in the recessive haplotype .
B-SequenceVariant O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O O O O O O O O O O O O O O O O O O O