Organophosphate and carbamate poisonings in the northwest of Paraná state, Brazil from 1994 to 2005: clinical and epidemiological aspects - Ferreira, Alexandre; Maroco, Elisangela; Yonamine, Maurício; Oliveira, Magda Lúcia Félix de (Revista Brasileira de Ciências Farmacêuticas, 2008)