Mortality trends related to dermatomyositis and polymyositis, state of Sao Paulo, Brazil, 1985-2007: a study using multiple-cause-of-death - Souza, Deborah C C; Santo, Augusto Hasiak; Souza, José Maria Pacheco de; Pinheiro, Celso Escobar; Sato, Emilia Inoue (ACR/ARHP Scientific Meeting, 2009)