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Excluding the latter group, survivorship was significantly reduced among patients with both dysphagia and greater degrees of muscle weakness, among adults 50 years or older and among Negroes. No differences in survivorship were observed between males and females, between polymyositis and dermatomyositis or between those treated with and without corticosteroids.<\/jats:p>","DOI":"10.1002\/art.1780140210","type":"journal-article","created":{"date-parts":[[2007,2,14]],"date-time":"2007-02-14T16:06:38Z","timestamp":1171469198000},"page":"249-258","source":"Crossref","is-referenced-by-count":136,"title":["Factors Affecting Survivorship in Polymyositis. 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