Myositis in mixed connective tissue disease: a unique syndrome characterized by immunohistopathologic elements of both polymyositis and dermatomyositis - Vianna, Maria Angela A. G.; Borges, Claudia T. L.; Borba, Eduardo Ferreira; Caleiro, Maria Teresa C.; Bonfá, Eloísa Silva Dutra de Oliveira; Marie, Suely Kazue Nagahashi (Arquivos de Neuro-Psiquiatria, 2001)