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Five-generation pedigree demonstrating apparent autosomal dominant transmission of familial dyskinesia and facial myokymia. Affected individuals are denoted by gray symbols. Haplotypes for nine markers on chromosome 3 are shown for all participating subjects; chromosome segments containing the putative disease-causing allele are shown in black; an ambiguous segment is shown in gray. Arrows identify recombinations in two affected persons that define the minimal linkage region.
